2018 Bmw 640xi prices in the U.S.
The median asking price for a 2018 Bmw 640xi in the U.S. is $19,699 based on 27 active listings.
As of July 25, 2026, the median asking price for a 2018 Bmw 640xi in the U.S. is $19,699, based on 27 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 27 active dealer listings, refreshed daily Methodology →
Typical: $18,500–$21,738 — the middle half of 27 asking prices
Why the wide range? Price depends mostly on configuration and mileage — see below. This spread covers the middle 96% of asking prices: we exclude the cheapest and priciest 2% (payment-priced ads, typos, salvage) so outliers don't distort it.
What moves the price on a 2018 Bmw 640xi
The $18,500–$21,738 typical range isn't randomness — one factor explains most of it:
Asking prices run about $19,977 at 75K–90K miles and fall to $18,249 at 90K–105K miles — roughly $1,200 for every 10,000 miles.
Find your mileage and trim in the configurator below.
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Modelled from 27 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2018 Bmw 640xi: a fair price for your mileage
A 2018 Bmw 640xi sheds roughly $1,200 for every 10,000 miles. Find your mileage below.
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| 75K–90K miles | 11 listings | $19,977 | $19K–$21K |
| 90K–105K miles | 6 listings | $18,249 | $18K–$19K |
Same trim and condition assumed — mileage is the biggest lever after configuration.
Trim-level pricing isn't reliable enough for this model yet — mileage and configuration explain most of the spread above.
Price trend
Average price is up $1,425 since June 11.
2018 Bmw 640xi prices by state
| State | Typical price | Listed this year | Active now |
|---|---|---|---|
| California | $21,587 | 7 | 7 Shop 2017–2019 nearby → |
Listed this year counts every 2018 Bmw 640xi first listed in 2026 (sold and active), with currently active cars as a floor. Typical price is the median of each car's latest asking price — or the average of active listings where this-year data is thin.
Keep exploring 640xi prices
2018 Bmw 640xi · $21,716 typical · 27 listingsOther Bmw 640xi years
Live 2018 Bmw 640xi listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2017–2019 Bmw 640xi listings on VehiSales →.
More 2018 Bmw prices
Frequently asked questions
Why do 2018 Bmw 640xi prices range from $14,272 to $45,341?
The spread comes down to configuration and mileage: higher-mileage, base-configuration examples sit near the low end, while low-mileage and premium configurations reach the top. Half of all listings fall between $18,500 and $21,738 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2018 Bmw 640xi?
Expect roughly $1,200 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $3,600 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
How many 2018 Bmw 640xi are for sale right now?
27 in total. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 27 active listings for this vehicle across dealer sites nationwide, updated every day. Average and median are computed from real asking prices on live listings. We exclude the top and bottom 2% of prices to remove data errors, salvage titles, and monthly-payment figures posted as if they were sale prices. Prices reflect dealer asking prices — not final sale prices — and exclude taxes, fees, and incentives. Trim and mileage move the price more than any other factor; see the breakdowns above.
Want the original factory equipment and MSRP behind a specific car? Look up the original Monroney sticker for a 2018 Bmw →
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Check individual VINs before you buy — decode the exact trim and mileage, see every active listing, and how each price compares to the local market.