Buying on line requires some degree of hope and trust.
I have had good experiences with: BuddiesProShop, BeansProShop, bowlingball.com, Wild Octopus, bowlbetternow.com, and fellow poster Iketown300.
I have purchased balls from bowlingball.com more often than not because he has a huge presence on ebay and I enjoy the auction.
BuddiesProShop and bowlingball.com are offering great prices that include shipping on several balls that are current production. I didn't take advantage of buddies sale on the RS-P, and the RS-X, and I wish I had, and I wish there could be a similar sale on Dynothanes' Centrifical Mass.
Anyway, several of the proshops are represented on this forum by both employees and owners, and I am sure you would have a good experience with any of them.
I haven't had a truly bad experience with any of those I have mentioned - one may ship a little faster that the other, one may have great after sale comunication and another not. Bottom line - I have always received what I ordered from all of them.
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OnlyBowling