That's a really good idea, somehow getting and delivering coban in bulk alone would be a life saver for me at least. Let me buy a 4" x 10 foot roll instead of those tiny packages at the drug store.
The big drawback for me though is mobility. I really can't walk around a store anymore. I just can't. So unless a store has those little electric carts, I'm pretty much hosed.
Fred Meyer is pretty good. Walmart is 50/50, so is Safeway.
I really wish there was a program that kept store carts maintained, up to date and working, or maybe even some kind of loaner program.
I looked at just buying one and the cheapest is like $2,000 on Amazon. If you go to a rental place like McKesson, it's even more.