JB is free, performing it is called a service. Am I not allowed to sell a service? I'm not catching your logic, it's like it isn't there. Explain what you meant with your question.
EDIT: Not sure who is going into the JB business. I thought it was GMouse so I quoted him/her. Bob is confused apparently. Anyway, whoever it is, here you go.
Bob is on your side. Do not listen to these people that might think how terrible it is you want to charge people to do something they can do for free. That is, if it is possible to JB the iPad 2 in the first place.
You will find lots of folks addicted to free and when you dare to charge for something that is/will be available for free, darn you all to the hotter areas of Heck. You horrific old fart, how dare you? They might say that. Well except for Sweetpoison, she is a doll.
Hot, too. But I digress.
I say go for it, my man. Or girl, not sure of your gender. Make some big dollars, do not cheat, be sure to pay the tax man, and live the good life on your dollars. Earned honestly, Bob wishes you all the luck.
I am all for making dollars by the heap. Nothing wrong unless you FU a few iPads. So make sure you address the 'what if' issues. Also mange sure that you warn people that their warranty is null and void if Apple discovers the j/b.
Luck to Ya, Bob