Welcome to MB Thomas RV Sales | MBThomasRVSales.com, The oldest RV dealer serving the St Louis area RV community since 1965. We specialize in New & Used motorhomes, travel trailers, and truck campers. MB Thomas RV Sales is also the leading RV rental company in the midwest. We have a parts and service department available for just about any problem you may encounter. Try renting one before you buy! It is a good way to experience a RV and the great fun you and your family or friends can have. Vacations should be fun without worry!.