As far as price, you can start by going to
http://www.nadaguides.com . They have an RV section.
Looks like you did OK. A bare bones '97 3124 has an average retail of $8440. Add on whatever options you have, and the value will be higher. The key, of course, is in the word "average". As Leon pointed out, you have to make sure everything is in decent shape, and the thing hasn't been abused.
Bill