One great place to research RV's in general is
PPL in Texas. All types are posted and they have a
sold list that shows the Texas market value for various models and year of manufacture. I like that they have both the photos and the floorplans for each model. Good way to learn about layouts etc.
We have a 2003 22' 350 V10 that we love. Bought from craigslist in 2009 and paid about the price you are looking at. Has everything and in a small footprint. If you want to tow you might look for a 24' model with a 450 chassis though. The 350 is more limited in carrying and towing capacity. Apparently the gas mileage is about the same, even with a larger rig.
Also check out of town craigslists in places like Florida where older folks sell their RV's. You can usually fly there very cheaply and pick up and drive home. You can get the rig inspected before you go. It doesn't make sense to buy locally if rigs are available and for sale more reasonably where there is a larger market.
