I have two balls for sale or trade. Both are 4 1/2 inch span, single drill, and in pristine condition. One is a clear Ebonite Wolf and the other is a Ebonite Jaguar. Both are 15 lb. Asking $30 each plus shipping for each.

http://i161.photobucket.com/albums/t213/argintessa/Bowling%20Balls/wolf1.jpg
http://i161.photobucket.com/albums/t213/argintessa/Bowling%20Balls/wolf2.jpg
http://i161.photobucket.com/albums/t213/argintessa/Bowling%20Balls/wolf3.jpg