2018 Mini Cooper Convertible S
WMWWG9C50J3E38731
GOOD DEAL
· $2,904 below typical price
Chesterfield, MO
This 2018 Mini Cooper Convertible S is listed at $16,087 with 64,728 miles in Chesterfield, MO.
Sold by Jim Butler Kia
Hours
- Mon
- 9:00 AM – 8:00 PM
- Tue
- 9:00 AM – 6:00 PM
- Wed
- 9:00 AM – 8:00 PM
- Thu
- 9:00 AM – 6:00 PM
- Fri
- 7:30 AM – 6:00 PM
- Sat
- 9:00 AM – 6:00 PM
Contact details come from the dealer's listing and public business records. VinAssessment is not the seller and takes no fee — you deal with the dealer directly.
2018 Mini Cooper Convertible S
VIN WMWWG9C50J3E38731
Market price range
Based on 59 comparable same-build listings · Market data as of November 6, 2026This vehicle: $16,087 — $2,904 below the typical market price ($18,991)
Asking $16,087 · typical market price $18,991 · based on 59 comparable same-build listings.
See all 2018 Mini Cooper Convertible prices — typical $18,991 →
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2018 Mini Cooper Convertible S for sale near ChesterfieldMO
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Price history for this VIN
Price dropped $599 (−3.7%) over 4 days.
Asking prices recorded across 3 listing dates for VIN WMWWG9C50J3E38731, spanning 4 days.
Active listing
Full listing history on VehiSales →| Dealer | Location | Price | Mileage | Listed | Seen |
|---|---|---|---|---|---|
| Jim Butler Kia | Chesterfield, MO 63005 | $16,087 | 64,728 mi | 2026-10-30 | 0 h ago |
Decoded from the VIN
NHTSA build data for WMWWG9C50J3E38731Full factory specs for this build →
- ✓ Backup camera
- ✗ Blind-spot monitor
- ✗ Lane departure
- ✗ ABS
- ✓ Electronic stability
Fuel economy (EPA)
Assumes 15,000 miles a year at $3.10/gallon and 30 MPG combined.
5-year cost to own
Beyond the sticker: what this 2018 Mini Cooper Convertible likely costs over five years at 15,000 mi/yr.
Estimate — insurance and taxes vary by driver and state.
Model-level data for the 2018 Mini Cooper Convertible from EPA fueleconomy.gov, refreshed October 29, 2026.
How it compares to rivals
Median asking price for comparable body styles listed near this car| Model | Median price | For sale nearby | vs this car |
|---|---|---|---|
| 2018 Mini Cooper Convertible S (this car) | $16,087 | 59 | — |
| 2019 Audi A5 | $15,669 | 2 | −$418 |
| 2016 Mercedes-Benz E-Class | $19,460 | 2 | +$3,373 |
| 2017 Chevrolet Camaro | $22,134 | 2 | +$6,047 |
| 2018 Ford Mustang | $29,310 | 2 | +$13,223 |
Cheapest active listings of each comparable body style in this region — median of what those models actually ask.
Market by model year
What each model year costs right now — live supply, median asking price and how much value each year keeps versus the newest one.
| Year | Units for sale | Median price | vs newest | Avg mileage |
|---|---|---|---|---|
| 2027 | 590 | $46,598 | 100% | — |
| 2026 | 849 | $43,574 | 94% | 842 mi |
| 2025 | 62 | $36,683 | 79% | 8,320 mi |
| 2024 | 211 | $30,849 | 66% | 21,910 mi |
| 2023 | 77 | $30,000 | 64% | 24,305 mi |
| 2022 | 54 | $27,998 | 60% | 32,326 mi |
| 2021 | 34 | $25,190 | 54% | 35,417 mi |
| 2020 | 27 | $23,097 | 50% | 39,699 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
