[found a 1980 Avanti II]

I am a new guy to all this but have loved the Avanti since the first one I saw as a teen. I saw a 1980 that has been sitting outside for several years (kinda' makes you sick) and the paint is rough, interior is rough, don't know if it runs or what the frame looks like. If engine doesn't run and frame is rusted, any idea what this could bring? I'm in the process of trying to locate the owner but it seems strange it has been sitting so long. Any thoughts would be appreciated. Thanks, Pat L