One Piece of Advice

Insist on getting from the seller - whether new or used - a complete walkthrough, inspection, and demonstration of EVERYTHING in the RV. This should include everything: water heater, refrigerator, microwave, toilet, tongue jack, stabilizers, furnace, AC, control panel, awning, water pump, winterizing, filling and emptying tanks, flushing tanks, etc, Ask questions and Ensure that you understand how every system works and that every system is working.

This means yes, you want them to demonstrate to you by actually put water in the tanks, flushing the toilet, running water in the sinks, and then draining the water in the tanks, You actually want them to demonstrate turning on the refrigerator and verify it works. Same with furnace, AC, electrical, electric cord, batteries, pump, etc.You will learn a whole lot about how these systems work and at the same you will know that they work as intended; or they will fix them before you pay them. This should take a couple of hours but is time well spent.

It would even not be unreasonable to pay a couple hundred dollars for this “service”, but I would negotiate hard for it to be included without extra cost; depending on how good the “deal” is to begin with. It would be money well spent for a first time RVer in my opinion.