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Tesla Model S vs Model X: Finding the Right One With FSD Under $40K

Ravi Vaja

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In this article

A Model S and a Model X can carry the same badge, the same price, and the same promise of Full Self-Driving, and still be completely different purchases. In a real discovery call, one buyer arrived knowing exactly what he wanted and one thing he could not do yet: pay for it. Here is how the search unfolded, and the two checks that decide whether a sub-$40K Tesla is a bargain or a bill.

When Trust Comes Before Payment

Partway through the call, the client raised something most companies would treat as a dealbreaker.

"I get paid once a month at the beginning of the month. So I can't do anything until the beginning of next month."

The engagement had not started. No fee had been paid. The straightforward commercial answer would have been to schedule a follow-up four weeks out and move on.

Neel Mehta answered differently.

"We believe in our clients. It's not about just collecting the fee. We can kick off the process today. You see what we are finding. You experience how our team is communicating, coordinating, and finding the vehicles in the market. And once you are ready to make the purchase, we'll also facilitate the purchase."

The reasoning was practical as much as generous. A rare-configuration search takes roughly seven to ten working days. Waiting for the first of the month would push delivery weeks further out. Starting immediately meant the research, the shortlist, and the negotiation could all be complete by the time funds arrived.

The client watched the work happen before paying for any of it. That sequence is only possible for a company whose revenue does not depend on locking someone in.

Same Badge, Same Price, Different Car

The client's brief was specific: a 2016 or 2017 Tesla, Model S or Model X, with Full Self-Driving on HW3 hardware. He had a clear preference and an open mind about which body style.

"I'd rather have an X, but those are more rare."

That instinct was correct, and his flexibility turned out to be an asset. Under $40,000, Model S and Model X listings sit side by side with similar years, similar mileage, and similar asking prices. Most buyers treat the choice as sedan-or-SUV preference and move on to sorting by price. That skips the parts that decide whether the purchase works.

Model X brings falcon-wing doors, a higher seating position, available third-row seating, and more cargo volume. It also carries more weight, which costs range, and those doors are a mechanical system with their own long-term considerations.

Model S is lighter, typically more efficient, and considerably easier to find used. That last point matters more than it sounds. Inventory depth is negotiating leverage, and in this generation Model X units are genuinely rarer. Rarity supports price.

For a buyer comfortable with either, searching both roughly doubles the candidate pool. A wider pool means several dealerships competing rather than one seller setting the terms.

Behind Every Great Deal Is One Team. Meet Car Concierge Pro

Neel Mehta, founder and chief negotiator at CCP, is a TEDx speaker and a Biomedical Informatics graduate from Arizona State University. CCP began with a personal frustration. Shopping for his own first car on a graduate student's budget, he found a vehicle listed near $22,000 and was quoted roughly $31,000, explained only as mandatory packages, required insurance, and add-on warranties. He took time off work and visited eleven dealerships in five days. Every one quoted a different number for the same car.

"It has to be very simple. Price of the vehicle, minus applicable discount, plus applicable taxes. That's it. But they don't make it that easy."

Friends heard the story and asked for help, then their parents and siblings. That became the business. CCP is 100% independent, with no dealer affiliations, commissions, or kickbacks. Dealerships regularly offer $2,000 or $5,000 to push inventory toward the client network, and those offers are declined every time. The team has served 1,100+ clients, negotiated over $6.14M in client savings, and earned 100+ reviews at a 4.9 rating, alongside BBB A+ accreditation and two 2025 Corporate Vision Awards. CCP operates across the USA, Canada, and the UAE, Monday through Saturday.

Explore the full CCP Car Buying Services to see how every engagement is built around the buyer's interest alone.

The First Variable: Why HW3 Decides the Purchase

For any buyer who wants Full Self-Driving, hardware generation is not a detail buried in a listing. It is the whole decision.

Teslas from 2016 and 2017 commonly shipped with Autopilot Hardware 2.0 or 2.5. Full Self-Driving requires Hardware 3.0, a different computer entirely. A vehicle can be advertised as FSD-capable, display FSD-related menus, and still not run the hardware FSD actually needs.

Two cars from the same year, in the same color, with similar mileage and similar prices can therefore be fundamentally different products. One does what the buyer wants. The other never will without a hardware upgrade.

This client understood the distinction and named it directly, which is uncommon and made the search sharper. Three things need confirming in writing rather than in conversation:

  • The exact hardware version physically installed, verified against the VIN rather than inferred from the model year
  • Whether FSD was purchased outright or held on a monthly subscription, since subscriptions do not transfer to a new owner
  • Whether the configuration is documented by the seller, not simply described verbally

That last point matters. Salespeople answer in the affirmative by training. Asked whether a car has FSD, the answer is almost always yes. Asked to put the hardware version in writing beside the VIN, the answer becomes considerably more precise.

The Second Variable: The Battery Is the Asset

On a used electric vehicle, the battery is the majority of what a buyer is actually purchasing. Its condition decides whether the transaction makes sense at any price.

"Especially in a Tesla, a very common mistake of buyers is that they will only look for the lowest price Tesla in the market and go and directly purchase it. But then in about a month or a month and a half, you have a very big hole in your pocket, because you have to replace the battery. The battery was at end of life, and now you have four thousand, five thousand, seven thousand dollars of cost associated with replacing it."

The math is unforgiving. A buyer finds a Model S priced $3,000 below comparable listings and feels like they won. Six weeks later a replacement quote arrives at double the discount.

CCP runs three layers of verification before any deposit is placed:

CheckWhat It Confirms
Clean Carfax reportNo accidents, fender benders, or reported damage on the VIN
Dealership inspection reportFull service-center review of drivetrain and systems
Battery life-cycle verificationRemaining capacity and replacement history

This is what CCP calls value for money, and it is deliberately not the same as lowest price.

"It's not just about buying the lowest price or the lowest negotiated price vehicle, but looking at the longevity. If you buy it today, we want to make sure that at least for the next two or three years, you don't have any out-of-sight expenses which will burn your pocket."

Choosing Between Them Under $40K

ConsiderationModel SModel X
Body styleSedan, lower stanceSUV, higher seating position
Cargo and seatingGenerous for a sedanMore volume, available third row
EfficiencyLighter, typically better rangeHeavier, range cost from weight
Used availabilityMore units in marketRarer, which supports price
Distinctive hardwareConventional doorsFalcon-wing doors, added complexity
Negotiating leverageDeeper inventory, more competitionThinner supply, firmer pricing

The practical guidance at this budget is straightforward. If a buyer genuinely needs the third row or the cargo height, the Model X premium is worth paying and the search simply takes longer. If either body style works, searching both and letting hardware and battery condition decide produces a better car for the money than committing to one shape upfront.

Finding the Needle in the Haystack

Rare configurations do not concentrate on one platform. They scatter across dozens of marketplaces, dealership inventories, and cars never listed publicly at all.

"We do a very extensive search, not only simply on Cars.com or CarGurus, but across more than 18-plus online platforms. This way we are able to find the needle from the haystack."

The research team calls each listing individually and contacts dealerships directly about vehicles never posted online. That second category is significant. Cars in transit, recent trade-ins not yet photographed, and inventory held for internal reasons never surface in a consumer search, but they exist.

Every option lands in a live shared document the client can open at any time: the listing link, the dealership, distance from the client's ZIP code, exterior and interior colors, hardware and package configuration, FSD status, Carfax findings, the contact person, the initial quote, and the running comment thread from every conversation.

For a search this specific, breadth is not optional. It is the difference between two candidates and twelve.

Eliminating Dealer Add-Ons Before They Inflate the Price

A used Tesla listed at $18,000 should cost $18,000, plus legitimate taxes, title, and registration. Nothing beyond that.

What often appears instead is a stack of dealer-added line items introduced late, after the buyer has emotionally committed:

  • Window tint packages
  • Security or anti-theft packages
  • Etch fees
  • Dealer-installed accessories
  • Protection and add-on products
  • Inflated documentation charges

"We want to ensure that the dealerships are not marking up the vehicles by adding all the miscellaneous services such as window tint fee, security fee, etch fee, to balloon up the price. So if the car is listed at eighteen thousand dollars, then on top of that only the applicable taxes and fees are added."

CCP requests itemized pricing from every dealership before negotiation begins, specifically to surface these charges.

Negotiating With People Who Can Actually Say Yes

Most buyers negotiate poorly for a structural reason rather than a personal one. They are negotiating with someone who lacks authority to give them what they want.

Frontline salespeople work within pricing boundaries set elsewhere. The people who can genuinely move a number are internet sales managers, directors, and finance staff. CCP works with those roles specifically, across every dealership holding a matching vehicle, simultaneously.

"We do multiple rounds of negotiations. It includes calling, texting, emailing, working not only with the frontline salespeople but also with the internet sales manager, directors, finance people at the dealership who are able and have the ability to lower the price."

Running these conversations in parallel is what converts a search into leverage.

Running Both Tracks

The client was open to new as well as pre-owned, and CCP built comparisons for both rather than assuming the answer.

"We will create both the comparisons. We'll compare for the new one and list down all the options and the prices, and we'll also do it for the pre-owned one, the 2016 to 2017 range, and see what is out there in the market."

For rare legacy configurations the used market usually wins, since the specific hardware is not available new. But running both costs the client nothing and occasionally reshapes the purchase entirely.

For buyers weighing an EV against a hybrid or gas vehicle, CCP also builds a five-year total cost of ownership comparison covering insurance, maintenance, repair costs, taxes and fees, financing, depreciation, and fuel or charging. The results are frequently counterintuitive in both directions.

Protecting the Deal at the Signing Table

The final risk arrives at the paperwork. A negotiated price can quietly change. A vehicle can be swapped for a similar one with fewer features. Fees eliminated earlier can reappear on the buyer's order.

CCP stays available through signing, confirming the vehicle delivered matches the vehicle negotiated and that the price on paperwork matches the price agreed in writing.

A Transparent Engagement, Structured Around the Buyer

CCP's independence is only possible because of how it is paid. No dealer kickbacks, no rewards, no back-end offers.

The Car Buying Concierge engagement is $998, covering market analysis, inventory sourcing, best-price negotiation, and dealer outreach through closing. The fee is paid by the client alone, which is what allows every recommendation to serve the buyer's interest and nothing else.

Communication runs on the client's preferred channel: for this buyer, email, with phone or text reserved for the moment he was at the dealership and might need a fast answer.

The Car Concierge Pro Difference

  • Paid only by the client, never by a dealer, no commissions or kickbacks
  • A live shared spreadsheet for every client, full transparency
  • 18+ platform inventory search plus direct dealership sourcing
  • Hardware and VIN-level verification on configuration-specific searches
  • Three-layer due diligence on used EVs: Carfax, inspection report, battery life cycle
  • Itemized dealer pricing reviewed to strip out unnecessary add-ons
  • Value-for-money analysis weighing price against mileage, condition, and longevity
  • Negotiation with decision-makers across multiple dealerships simultaneously
  • Support through signing, so the negotiated deal is the signed deal

Every engagement is backed by CCP's 30-day money-back guarantee. Terms apply.

Real Deals. Real CCP Client Savings

VehicleSavings
Hyundai Tucson$3,500
Lexus GX550$3,800
Lexus NX350h$4,500
BMW X3$7,592
Audi S5 Coupe Premium Plus$8,070
Mercedes-Benz S500 4MATIC$22,334
Porsche Panamera 4S$52,337
Bentley Bentayga EWB$60,174
Rolls-Royce Ghost$111,368

Every result reflects a real CCP client engagement. Identifying details are withheld for privacy.

The CCP Out-The-Door Price Calculator is publicly available for buyers who want to map every cost into a single landed total.

Sound Like You?

  • You want a specific Tesla configuration and cannot find it by filtering one listing site
  • You need Full Self-Driving verified against the VIN, not described over the phone
  • You are weighing Model S against Model X and want an honest read on both
  • You are concerned about buying a Tesla with a battery near end of life
  • You want the true cost compared across years, not just the sticker price
  • You are tired of advertised prices that grow with add-ons and fees
  • You want someone whose only incentive is your outcome

Frequently Asked Questions

How do I know if a used Tesla has HW3?

Confirm the hardware version in writing against the VIN, since model year alone does not determine it. Check what each generation supports on Tesla's official Autopilot support page.

Should I choose a Model S or Model X under $40K?

Model S offers deeper used inventory and better efficiency; Model X adds cargo space and a third row at a rarity premium.

Does Full Self-Driving transfer to a new owner?

Only if FSD was purchased outright; subscription-based FSD stays with the previous owner's account.

How much does a Tesla battery replacement cost?

Commonly $4,000 to $7,000, frequently exceeding any discount on a cheaply priced listing.

What should I check on a used EV that I wouldn't on a gas car?

Battery replacement history and remaining life cycle, plus hardware configuration tied to the VIN. Verify open recalls first through the NHTSA recall lookup.

What does the engagement cost?

$998, split $499 at kickoff and $499 on delivery, so CCP earns the final half only by delivering the car.

Does CCP take commissions from dealerships?

No. Zero dealer commissions, kickbacks, or incentives; the company is paid only by the client.

Buyer-first, every step. No dealer incentives. Full transparency.

Every engagement is backed by CCP's 30-day money-back guarantee (terms apply).

From a first hesitant question to a fully mapped, buyer-first strategy, this discovery call shows what it looks like when the person guiding your purchase answers only to you.

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