Its extremely clean, so long as you go into it with the mindset that you have the cash to do a full sleve job rebuild and talk him down a tad on the price to go with that, I'd say go for it. nIf it turns out to just be a head gasket, then great, but you're the one taking the gamble with the cash, not him, so don't be throwing too many dollars around.. If he had the money to fix it, hed be doing it., obviously his mechanic shot him a figure he couldn't live with, so you are in a good position. A dealer wouldnt give him a plugged nickle in trade on the thing and if he were to put it up on salvage auction he might get $100, most he could get would be a boneyard , scrap is high right now , he could probably get $400. Buy wisely.