2004 911 GT3

1. Comparable market$121K

   11 of the same trim advertised at around 41,736 mi.

2. Mileage-2.8%$117K

   48,000 mi against 41,736 mi for the cars it is priced against. This cohort gives up 14.0% of its value each time the odometer doubles.

3. Model year+14.2%$134K

   A 2004 against a cohort centred on 2003.

4. Asking to sale-4.5%$128K

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

11 cars, model years 1999–2004, asking prices spread ±24%.

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