used RV - carfax shows driven 50,000 miles in one year

Thanks for the quick replies! Here is the logic behind what's going on. Actually, we are getting a very good price from a reputable RV dealer, and, with the new revelations, we think that we will be able to get an even better deal. Unfortunately, there are no maintenance records. Nonetheless, it still seems like a good deal to us. The interior was well maintained, the engine looks quite new and sounds smooth and it passed state inspection. The vehicle does come with a 30 day warranty, so we do have some time to figure out what's wrong with it. But, obviously, there is no way for us to know the potential problems with this vehicle unless we get it to a mechanic. We were planning to get an extended warranty, but found that wasn't a possibility due to the high mileage. So it seems logical to us that we could simply save the $5,000 to $6,000 that we would have spent on the warranty for the rainy day when the transmission goes. So, we'd really want to know if our logic make sense to the more experienced RV'ers out there. We'd love to hear any advice you have for us.

Possibly a rental? If so, maybe "abused" by users with little or no knowledge of proper operation of systems.

That works out to about 135 miles every day. Not much for a full timer.

My gut says move on unless this is the absolute best RV for your lifestyle (hard to believe) and don't plan to use it much during the year and are really really happy with the price.
BTW are there any maintenance records? Oil changes, etc.
That's my $.03