There ought to be a "stickies" saying that "Typical Class C motorhomes get 7-9 mpg under average driving conditions". Another might say "Lazy Daze, Born Free, and a few others are generally thought to be the best quality. They cost a lot more new but resell for more money used." "Old motorhomes may be a good deal if you can do most repair and replacement work yourself". Most really old rigs sell for around $5000 despite new tires, repairs and upgrades. Don't spend too much more on an old motorhome than you can sell it for. For every generalization, individuals will point out their exceptional experience which does not make the generalization untrue.