i dont think thats all that high for an rs/ss... my ex has a 67 rs/ss in BEAUTIFUL shape. he has the original engine and trans, but a 383 with a glide are in it right now, car runs high 11s with no problem n/a. he was offered over $30k for it and refused it.
But uhh, yeah, that guy is probably one of the luckiest guys around.. just over 100 bucks for a car that nice. Wish my luck was like that