1989 328 GTS

1. Comparable market$155K

   13 of the same trim advertised at around 28,886 mi.

2. Mileage+25.4%$194K

   850 mi against 28,886 mi, the mileage the cars it is priced against carry. This cohort gives up 9.8% of its value each time the odometer doubles. That curve was read off cars between 8,728 mi and 59,652 mi, and nothing has been observed beyond it, so the mark is struck at 4,364 mi rather than carried out to this reading. Confidence is low until a car near this odometer is advertised.

13 cars, model years 1985–1989, asking prices spread ±6%.

Struck from advertised cars and adjusted to this one. Indicative only.