Still, that's a rare thing (ON EDIT: MY EQUATION SITUATION - NICK POSTED BEFORE ME). I see Equations on bowling.com and the like for around $100-120 something. At my proshop, drilling can run about 45 bucks, and at the same time, the proshop's selling the same Equation for $165, but drilling is included.
So you'll have to save more than that. Plus, you'll have to wait while it goes through the mail. Sometimes you'll want to buy from the proshop, spending $20 more just to know that you have it.
I also bought a new Machine from cheapbowlingballs.com. (



) That's a special thing. NO ONE has brand new discontinued Machines lying around anymore, so if you can find a site like this (which has $5 off coupons at the top of the page

) you can save A LOT on an NIB ball. The shipping came on time too; another good thing. The next best place to save is eBay, but they might not always have what you like, so...
Other stuff that isn't discontinued you may not want to bother with, ebcause between waiting for shipping
paying for shipping, and the cost of drilling together with the ball, I'm not sure it's worth the time. BUT everyone has a niche - proshops, internet sellers...
Edited on 7/26/2007 7:14 PM