I bought a very good condition 85 W123 300d, 175K no rust. It bacame the default daily driver the day it arrived due to my main car blowing a brake line. Came to about 4,000 after taxes and registration. I immediatly started driving it and have put 1000 miles on it already with no big problems. Due to its condition, I plan to drive until snow and salt begin then use it again one the weather improves. For me anyway, anything under $10K would be in the daily driver elegible class. My 58 on the other hand doesn't even go out in the rain.