Check the front end and tire specs along with the actual front axle weight before you buy anything. Some of these coaches are heavy on the front. Renegade started to change over their specs a few years ago from 12K to 18K. We run 315 steer tires up front and a lot of the newer coaches do the same.
Like some of the guys said, good buys are out there you just have to be patient and keep looking. We have a Detroit Series 60, 13-speed manual, twin screw. I've had a few friends have troubles with their automatics but it seems like it's always electrical related issues.