2007 Boxster S

1. Comparable market$33.9K

   12 of the same trim advertised at around 53,053 mi.

2. Mileage+7.1%$36.3K

   31,468 mi against 53,053 mi, the mileage the cars it is priced against carry. This cohort gives up 9.2% of its value each time the odometer doubles.

3. Specification+12%$40.7K

   This car has commissioned paint. The paint is priced at the usual 12.0%: this generation has fewer than three cars either side of the line to measure it on. 1 of the 12 cars it is priced against are commissioned too, so the step against them is smaller.

12 cars, model years 2005–2010, asking prices spread ±10%.

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