My only Storm balls are a used 15 lb Bolt Pro drilled with almost a 3" pin above the bridge and
a NIB 15 lb Bolt Pro, with a 2-3" pin.
Probably my 2nd favorite ball in the my entire bowling life.
I'd want about $50 for the used and $100 for the NIB, plus shipping.
They are much better than the Tour Power, in my opinion, as a control ball, but that's just my 2 cents. It would definitely hurt to part with either.
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"Those who do not remember history are doomed to repeat it."