I have a friend who paid 230 for a ball then the Pro Shop charged him 20 for thumb slug and 15 for inserts. Then charged him tax. He loved it, it was a Code Black and its working for him and he's shooting great scores with it but that's almost $290. Storm Balls cost a premium here in NYC.
The Pro Shop Owner had an a la carte price chart above the service area. $30 for Vise It on top of the Thumb insert, then $20 added if you want a customized thumb mold, that's $70 for an extra customized thumb mold if he wants one sized up or sized down.
If my friend had all that added to the ball, it would cost him $343.
In addition AMF owns most of the houses here so if you don't join a league to get the discount, it could cost $13 per game.
He's a doctor so he doesn't care but the difference between how much he paid to how much I paid was a shock.