I decided against it. He wants $500 for the bike; it belongs to his father. I did a quick search for the missing exhaust and carburetor, and it would cost more just for those than the cost of the bike. Then the repairs and rejuvenation could start. God only knows what it needs in addition to tires, tubes, cables, seals,and seat. I'd end up with a fortune into it.
But I still love it.