A bit pricey, but one just popped up on ebay a few hours ago. Check it out
http://www.ebay.com/itm/Hammer-Burn-New-In-Box-15lbs-/290782499236?pt=Bowling&hash=item43b3fcd1a4
How is the guy insane? Bidding starts at $100 and buyout is $150. Seems pretty fair to me.
Well, you have your benchmark price. That ball on ebay sold for 150+shipping.
Seems like it was When they stop making your favorite ball and they are all dried up supply and demand kicks in and value goes up.. Some balls go waay up.. Being cheap and wanting a rare item will never work.