I find it very annoying going through all stores individually to find a certain item. I don't know about anyone else but I'd really like a button to search for an item in all the shops. This will make it so much easier. :)

What you can do is search for the item in the marketplace, and that will link you to the shop it's in. :yes:

But after a while you get to know your way around the shops anyway. Most of the names are fairly self explanatory.