We bought our first Rv on Craig's list. It was a 30' class C, about 12 years old with under 40k miles on it. I saw some Class A's in the under $20000 range but we liked this one best. We had to do a lot of fix up (decals, countertops, etc) but the mechanical condition was good. Find a mechanic to do an evaluation of the Rv prior to your purchase. Check the age of the tires because the tread may look good but they could be deteriorated due to age. We didn't and got a blowout from a slipped tire belt. We promptly bought 6 new tires. Also check the coach batteries and the awning fabric. Look for delamination and look for water leaks.