It looks like offerings vary store to store - they had about 20 different items at the local Microcenter in Cleveland Ohio
Selection is less in their webstore - not sure is why and looks like vary from store to store - if you browse online make sure you select your local store.
Just one bad thing - Sparkfun shelf is not visible at all, they put it on the back of the bookstore - not too many people reading books today
Not sure why book store - may be Spakfun guys can work with Microcenter to make it more visible
It would be nice to have a wider local selection.