well, I picked up a Storm Super Power Pearl for $50 used from my local bowling shop when I started to learn how to bowl. Unfortunately, with bowling balls, unless you are really good and got good connections, it's not possible to really go out and try different balls out.
if the Bolt doesn't fit your fingers, you can always get it plugged and redrilled so keep that in mind but that's going to cost more money on top of the $50.
I dont know how serious you are about bowling either. If you just want something a little nicer than a lane ball so it goes through the pins nicer, than for $50, that's not a terrible deal. But if you're serious (want to get it redrilled for your fingers, etc), I think you can do better for the money.