For $200, take a chance on an obscure Buick....sounds like a engine rebuild is needed. http://www.ebay.com/itm/1984-Buick-...BO-/332178838850?_trksid=p2141725.m3641.l6368
Either he or his mechanic don't know what they're talking about. Has either one ever heard of a compression test? If the seller is being evasive, the vehicle was overheated. Which, depending on severity, would mean replacing the head gasket or the cylinder head, in an extreme overheat session. Nevertheless, for $200, I'd go for it. It's only a four-banger. Which should be easy to work on. Who knows? Maybe, it'll run just fine, after having replaced the radiator
High point of these little Buick Limiteds was the interior. You would think they would show a pic........