My buddy wants to sell his old J. Walter Kennedy NBA game ball.

The auction below ended at $307 for a weaker example of the same ball. A bunch of autos and not the same condition. Although, Rick could have easily been shilling again, so there's no way to know if that's a true price. Any ideas?

http://cgi.ebay.com/VINTAGE-NBA-Game...1%7C240%3A1318