Best ways to purchase a used RV?

Thanks for the great info, everyone! I'm glad I asked about the RV show's because I'm not really interested in drooling over what we cannot afford. We did look around our local campers world when we first started considering this idea, just to see what the difference between the different kinds of RV's are and what not - and I will admit, I did find myself sitting in the drivers seat of a $100k motorhome wishing I could drive it away lol. I will say this about the newer models though - I walked into most of them expecting to be more impressed than I actually was. They were very nice, but in my opinion, not worth the money they ask for them.