Check it out, if you know engines this could be a steal depending on what is wrong with it.
Seller describes it as starting but having no power and it makes a knocking noise, i bet you can get it pretty cheap.
http://cgi.ebay.com/ebaymotors/2-4L-TWIN-CAM-Z24_W0QQitemZ4613575209QQcategoryZ6163QQrdZ1QQcmdZViewItem

I could tell him what's wrong, the jackass has a blown head gasket. Your car should never over heat at Idle unless the fan's not working correctly. Second he sold the car with a blown head gasket to an unsespecting buyer, they drove it around till it warrped the head, now he took it back cause he new what was wrong in the first place. I would give him $500 no more!! If I we're to buy it.