I have wondered about this for awhile and was unable to really find much on a cursory search of the forums, or in game. At the moment, if you are in the item buying dealio, you can hold a button (alt?) and insta-buy a recipe. How about taking this same idea and having a button that would insta-buy everything in the item? This would make buying power supplies, bracelets, grieves, and other low cost items much easier to grab.
I am guessing there are probably moders out there that could do this easily, so why not make this into reality?