Somethign to consider, for a long time I didn't bother with shopping either. Then one time I "accidently" did it and found out the players really go into it, especially if they were "custom" designing it with special leatherwork designs or special enamelling designs on their armor, etc...
Plus, like I previously mentioned, shop owners are great lead ins for adventure hooks. Anywhere from theft/extortion problems, to finding exotic items, recovering exotic items, to special deliveries, ad infinitum.