Basically, they are paying you $100 to walk into a RadioShack.
PASS.
That is a funny way to put it. My wife's 4S has had a broken power button for close to a year, I'll take $100 off a 5S replacement for her - that seems to be the best deal going right now. She is not interested in waiting on the 6.
As to the discussion of the ability of the Radio Shack employees to be able to consult on electronics parts, I'm sure there are a few knowledgable sales dudes/dudettes out there, but they are certainly the exception. But how is that any different from any other store out there? On the whole, sales people are more about making the sale than educating the customer. I know I really appreciate a knowledgable sales person and steer my business to that store. In my neighborhood, that means shopping at Home Depot instead of the Lowes. The difference between my two local stores is shocking.
I'll put on my fire retardant suit now...