2009 Boxster S

1. Comparable market$32.8K

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

2. Mileage+29.8%$42.6K

   9,710 mi against 53,053 mi, the mileage the cars it is priced against carry. This cohort gives up 12.0% of its value each time the odometer doubles. That curve was read off cars between 22,033 mi and 141,901 mi, and nothing has been observed beyond it, so the mark is struck at 11,017 mi rather than carried out to this reading. Confidence is low until a car near this odometer is advertised.

3. Specification+3%$43.8K

   This car has a catalogued special colour. Most comparable adverts list no options, so they are read as cars without them.

14 cars, model years 2005–2010, asking prices spread ±11%.

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