Trader Sonia:
If you have any items you're not using, you can either pay to store them in a warehouse or make a little money by selling them to me. From what I hear, you don't want to be weighed down with a lot of useless equipment when you're facing monsters!
Buy Accessories.
Buy Spellbooks, Amulets and Blueprints.
Buy Common Items.
Sell.
Ask about the local lord and tax rate.