For a typical car with 150K-175K in generally good condition but needing some repairs, perhaps $2K. I sold my '93 with 160-someting-K a year ago for $1500. I had a half dozen buyers rushing over to be the first to claim it. The car was very clean and ran well, but it leaked ac refrigerant and the head gasket was starting to seep. Disclosing these didn't seem to phase them, though it probably should have...