well that sounds like a hell of a deal. I would do it if their going to give you a warranty just like buying a new one. you know , lifetime warraty on the primary and secondary with 5- years parts and labor on all other parts. So I take it this is a frind lol trying to get the service work on this thing till it craps out and he sells you another used one? I think we all have these things in our junk piles but I dont think a lot of us try to sell them.