I'm not sure of the miles, but I've seen Deloreans advertised for between $15k and $25k...almost NEVER more than that...but usually for about $17k. Simply because they are such collectors and fairly unreliable they dont' tend to become daily drivers for most people. I'd say it offers a nice alternative, however, for those seeking something interesting.
A couple more rare exotics that can be had for relatively small prices are the Birklin and De Tomaso Panteras.