Former Rental RV? What say you..

This may make us look a little foolish, but we unknowingly bought a rental class c that was being sold by a large rv dealer in the Dallas area. It wasn't the typical rental type (2007 Winnebago Outlook) but it had 47,000 miles so I was suspicious about it being a rental. The salesman looked up the owner and told me it wasn't a rental but a trade-in. We test drove it twice, and examined it closely in the bright sunlight. Nothing out of the ordinary. It wasn't until we took it home that we saw the faint shadow of numbers on the cab overhang. The light has to be just right--usually you can't see it. So far the unit has performed well, but we wish we had investigated it more. The favorable purchase price affected our decision. I guess it could have been originally a rental and then sold to an individual who later traded it in.