No service records does when the seller is known does lead one to wonder. How about asking which shop or shops the seller frequented. Then a few questions to the mechanic might be enlightening. Just consider that with a older MH you may need to replace all tires, even if they look good, check the age. Also, batteries. You could be looking at a chunk of change being added to the purchase price. Previously owned vehicles are usually sold As Is, so when you sign on the dotted line the dealer has no further responsibility unless they willfully withheld information. So they know nothing...nothing. If you really like the rig and decide to go ahead shop for an extended warranty. Wholesale Warranties (Wholesalewarranties.com) can give you some prices. They are also good people to work with.