Unless you count "more potions". I've got steel and silver weapons and a full suit of steel plate armour, am level five, and weapon and armour stores are still selling mostly iron, leather, fur, and a bit of steel. On the upside, there's plenty of potions and scrolls.
Am I levelling too fast for the store restocker script to keep up? Or are stores mostly places to dump loot? Or am I doing something wrong somehow? As far as I know, none of my mods should change store inventory.
Don't get me wrong; I'm having quite a bit of fun. But monsters are getting harder to fight, out of proportion to my ability to keep up. Even the couple of silver weapons I have were requisitioned from the fighter's guild boxes after I joined.