The key is to know how to deal. Never, ever take the first offer. They always come back high. Don't let them see how much you want it, and negotiate. Most dealers want to move inventory and they will negotiate, if they don't want to give you a deal you want, walk.
We had a really good trade which was paid for. The sticker on our truck after rebates came out to like 63k. Rather than try and talk them down on the truck, we talked them up on our trade. We ended up at half to askig price of the truck after tax, title, and tags it was like 32k which we paid cash for.
The RV deal was because we waited until they were clearing them off the lot for the new 20 models. We ended up financing the rv to keep credit high. In the end we financed 30k which is very manageable as we have no other debt.
We waited and watched them for quite a while and we saw the prices on the 19's going down until it was where we felt is was good, then we purchased.
I am not a compulsive buyer, and I used to sell campground memberships and time shares, so I know the rodeo game and play on my rules, not the dealers.