Buying an RV through a dealer or private seller?

I would say to shop both your local dealers for used, and also look at Craigslist. Extended warrantys are for the birds. When you see "The One" you will know it. Either way, be sure that all systems work. Learn how to read th date codes on the tires and find out how old they are. Old tires means you need tires. Tread condition is not an indicator. Check NADA for the retail price and haggle from there.