We found our bus thru the Asheville edition Iwanna. Amazingly enough it was close to were we were living at the time (drove it home on the back-backroads). You can read the ads online but you got to pay inorder to get the phone number. This is a good source of the cheaper buses since the ads are free. I had seen the ad for the bus we bought just before Christmas. The price was lowered a couple of months later and we bought it then. we also found our current RV thru the same paper (Greenville SC edition)
http://www.iwanna.com/