The one that they had here in Fort Myers was free. The 2 balls were a T-Road Pearl and a Jolt (I think it was the particle). The pro shop owner was switching grips around like crazy so anyone could try out the balls. All of Storm's balls (including the Secret Agent and T-Road Solid) were on display, as were all of Roto's ball. Also on display were Storm's bags, towels, wrist braces etc. There were no Roto balls available to try out.
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Don't argue with an idiot; people watching may not be able to tell the difference.