yj's arent' for everyone. thats a good year though, 92-95 were the best years. the 4 is a turd. it will last forever, but most who have had one, including me, stand by them, but wish they had the six. i own 3 4.0 jeeps now and will never buy another 4 cylinder after owning one.
if that yj is in good shape its a good buy. definately spend the money for a trusted shop to look it over real good. they should charge between half hour to an hour of labor, money well spent, in any jeep purchase actually.