Originally Posted by Obioban
Not that I'm particularly in a place to judge, since I've bought 2 M3s new, but...
In 3 years his $30,000 car will be worth $25,000.
In 3 years your $75,000 car will be worth $40,000.
In those three years, you will have had similar parts costs and similar driving experiences. You're down $35,000, he's down $5000.
This is an extreme case. It would be better to compare a high mileage $30k M3 to a lower mileage M3 that costs around $40k.
It's easier to find a M3 in the $40k range, so you can shop around for one that's been taken care of.