While on occasion I purchase shipping supplies from Uline or Amazon, I do most of it now from eBay and some from Staples (when the price is right, heavy, and I'm too lazy to go out and pick it up).
My bubble wrap is getting low along with my stay-flat mailers. I'm going to have to start looking around now and figure out where to go before it gets too late and I have to shut down the bay store. Gotta buy some boxes also because I am having the inventory that is stuck in a warehouse (mentioned on another thread) sent back to me. Hopefully it won't be too damaged to sell. Would suck to not even be able to break even on that debacle.