2007 911 Carrera S

1. Comparable market$56.5K

   59 of the same trim advertised at around 55,786 mi.

2. Mileage-5.2%$53.6K

   64,505 mi against 55,786 mi, the mileage the cars it is priced against carry. This cohort gives up 23.1% of its value each time the odometer doubles.

3. Specification+12%$60K

   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 59 cars it is priced against are commissioned too, so the step against them is smaller.

4. Model year-3.5%$57.9K

   A 2007 against a cohort centred on 2007.

59 cars, model years 2005–2011, asking prices spread ±18%.

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