I too think this is the old ATR car. Front and rear suspension makes me think it is their old car. (Rack and pinion steering and a rear 4 link suspension.) I remember the car weighed at or under 3000#. It did run at the track. It could be an IRS seized vehicle? Engine alone is worth more than 15K. My 02$. Gene
If it was a little closer I would be tempted to take a chance on it for $15k but it would be a chance. The problem with this sort of auction is that you can't start it or drive it and know that everything is ok. The motor may or may not be good. Its common to run straight water in race cars and depending on how it was stored it could have a cracked block due to freezing or parts could be missing or the shortblock could be wasted. It could be a bargain or you could go in the hole trying to get it back together, but I think it would be exciting to find out.