That has been my observation too, lots of "big rigs" for sale with low mileage for sale at attractive prices. My suspicion is that many people give up hassling with those things and want to get rid of them. Many people don't know how nice the small ones are. For extended travel, you trade a few hours of extra comfort in the evening for the advantages of a Class B. For example, if you are visiting a national park, B owners enjoy the convenience of an RV (bathroom, kitchen, extra clothes, etc.) all day long, but the big rig people are stuck in a car or tow pickup truck. Before I retired and went in to RVing, I had planned to get a big trailer but a friend told me about the Class Bs and after I checked into it, I realized what a good move that was.