Used 2018 BMW 640xi Price in the US
A used 2018 BMW 640xi in the US typically lists for $17,782–$22,800, with a median asking price of $19,880 across 41 active US dealer listings (as of 2026-09-03). The cheapest one listed right now is $9,995, a 2018 Xdrive GT in San Antonio, TX — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $17,782 – $22,800
- Median
- $19,880
- Cheapest 5%
- under $14,995
- Cheapest listed now
- $9,995
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$17,7672018 BMW 640xi Xdrive GT88,859 mi · Coconut Creek, FL · INFINITI of Coconut CreekView listing →
These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2018 BMW 640xi asks $17,782–$22,800. Cars this far under usually carry an older model year, a base trim or high mileage.
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10 pinnedFAQ
How much does a used 2018 BMW 640xi cost?
A used 2018 BMW 640xi in the US typically lists for $17,782 to $22,800, with a median asking price of $19,880 across 41 active US dealer listings. Nine in ten are priced between $14,995 and $28,394 (as of 2026-09-03, source: UnderMarket Cars).
Is $20,000 a good price for a used 2018 BMW 640xi?
That sits at about the market median ($19,880) for a used 2018 BMW 640xi. Under $17,782 puts you in the cheapest quarter of active US listings and under $14,995 in the cheapest 5%; above $28,394 is the priciest 5% (as of 2026-09-03).
What is the cheapest used 2018 BMW 640xi for sale right now?
$9,995 — a 2018 BMW 640xi Xdrive GT in San Antonio, TX, $9,885 under the median (as of 2026-09-03).
Are these MSRP or real asking prices?
Real asking prices from active US dealer listings, deduplicated by VIN — not manufacturer MSRP. They already reflect dealer discounts, and they exclude tax, title, registration and dealer fees.
How often are prices updated?
UnderMarket Cars refreshes US dealer listings continuously and re-generates this used 2018 BMW 640xi price page at least twice a day. The data date shown on this page is 2026-09-03.
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Prices updated 2026-09-03. Data covers active dealer listings across the USA.