How do I Make a Merchant Buy Stuff?

[Megatarius]

I didn't know you meant clutter as a result of several different mods adding to the same room.

[David Brasher]

I liked how in Morrowind most of the goods in a shop were out on display, and if you were a mean thief, you could steal every single item in the shop. You could fence the loot and come back to the store shopping and see that the merchant had nothing at all to sell in the merchant menu.