I have the opportunity to buy from someone I know an 04' v6 explorer. The engine was rebuilt at 90k not to long ago from a shop that I know does good work. It currently does need valve cover gaskets the seller has told me, which he said he'll be taking care upon purchase. He's looking to get 3500 is this a potentially good deal for an daily driver for a few years or more? or am I looking to encountering future problems whats your thoughts on this?