I found a 2000 GT long block that has 20,000 miles on it. I am told that it seized up. It comes with the block, rotating assembly, and heads. No accesories or manifolds. The guy selling it says he doesn't think the cams got starved for oil, but he really doesn't know much about the engine. He is only asking $100 bucks for it though. What are the chances of an engine being rebuildable after seizing up. Is it worth the 100 bucks to find out? I am thinking about buying this as a second engine that I can build up slowly as I save up money. Any advice?