1997 911 Carrera

1. Comparable market$157K

   9 of the same trim advertised at around 47,828 mi.

2. Mileage-21.5%$123K

   91,740 mi against 47,828 mi, the mileage the cars it is priced against carry. This cohort gives up 23.4% of its value each time the odometer doubles.

3. Model year+5.3%$130K

   A 1997 against a cohort centred on 1996.

4. Asking to sale-4.5%$124K

   Advertised prices sit above where cars change hands, so the mark is struck below the asks it is drawn from.

9 cars, model years 1996–1998, asking prices spread ±21%.

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