Used 2018 INFINITI QX80 for Sale nearSaint Louis, MO

How much does the 2018 INFINITI QX80 cost?

Prices have softened 14.95% compared to this time last year, making it a favorable time to shop this model year.

There are 679 listings available, which gives you a decent amount of inventory to compare before you buy.

If you find a listing below $18,977.14, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2018 INFINITI QX80 a good car?

Yes — the 2018 INFINITI QX80 earns a 4.6/5 user rating, which points to strong owner satisfaction.

Owners consistently praise its excellent ride quality, attractive design, and abundance of safety features. The value proposition also comes through clearly: you get a lot of luxury equipment for the money, and that matters if you want a full-size SUV that feels well equipped without pushing into a much higher price bracket.

For you, that makes it a strong fit if you want comfort, space, and a premium feel in a large SUV. The 31.7% good-or-great-deal share also suggests there are worthwhile listings to pursue if you shop carefully.

Is the 2018 INFINITI QX80 reliable?

Owners rate it 4.6/5, a strong signal of long-term satisfaction.

The owner feedback points to a vehicle that many drivers feel good about living with over time, especially because it is described as dependable in the way it delivers comfort, value, and a trouble-free ownership experience for many buyers. That kind of satisfaction matters when you are considering a used luxury SUV that is meant to serve as a long-term family hauler.

For used buyers, the main long-term ownership risk is less about enthusiasm and more about making sure the specific vehicle you choose has been cared for properly.

What should I look for when buying a used 2018 INFINITI QX80?

At 62.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report so you can separate clean examples from those with past damage. After that, prioritize a thorough inspection of body panels, paint consistency, and signs of repair, since condition matters more when you are shopping a luxury SUV with a mixed history pool.

It is also smart to focus on how the cabin and equipment present in person, because this model’s appeal depends heavily on comfort and features.

Is now a good time to buy a used 2018 INFINITI QX80?

This looks like a selective buyer’s market, with enough inventory and enough deal activity to reward careful shoppers.

• Deal availability: 31.7% of listings are priced as good or great deals.
• Inventory: There are 679 listings available.
• Price trend: Prices have softened 14.95% compared with last year.
• Clean inventory: 62.2% of listings are accident-free.

If you find a listing below $18,977.14, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 INFINITI QX80's resale value?

The current average of $18,994 sits slightly below last year's $22,331.

That decline suggests the market has moved in buyers’ favor, which can make resale timing more important if you plan to sell later. If you buy at the right price now and keep the vehicle in strong condition, you may be better positioned to limit depreciation pain when it is time to move on.

Vehicles with strong owner satisfaction ratings, like this model year's 4.6/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 INFINITI QX80 or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 31.7% of listings are priced as good or great deals.
• At 62.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 14.95% compared with last year.
• Owners rate it 4.6/5 — a strong satisfaction signal.

Consider the 2019 if:

• At $21,452, the 2019 costs more than the current year's $18,994 average.
• It feels more lavish and pricier, with a more upscale presence.

The bottom line: You should start with the 2018 if you want the better value play, especially because pricing has softened and there are still meaningful deal opportunities. If you are willing to pay more for a newer-feeling, more lavish version, the 2019 is the secondary path for you.

These recommendations are based on CarGurus' proprietary market data from September 4, 2026, CarGurus experts' opinions, and generative AI.