When I recently bought my 2008 toy hauler, the asking price was $33,750. I told them I needed to be out-the-door at $29,000, and they immediately dropped the price to about $26,000. With taxes and fees it came to $29,000 exactly. I was sorry I didn't offer less! They don't make my model any more, however comparable toy haulers seem to start about $58-62,000, so it looks like I paid less than 50%.
As someone else already mentioned, used RV dealers seem to be willing to negotiate and set their asking price accordingly.
BTW, This is my second RV, and both were used models. Both times I purchased the best extended warranty I could get. Not cheap, but on my last RV (Class C), it paid for itself a couple of times over. Two transmissions, and plumbing issues. I'm less positive I'll get my money's worth this time, with no drive train to deal with. However the generator, A/C unit, furnace, water heater, slide-outs and plumbing systems are things I don't want to have to think about. With the warranty in place, I don't have to worry for the next 4 years at least.