I'm trying to sell items when I'm in town. I tried a few things, but didn't get anywhere.
Can you help me?

Visit Kolos (blacksmith near the middle/western part of the town) or Triya (a little northeast of the center of the town) to sell items. I think there's a gambling character Duros, that you can sell to as well, but I never visited him.

Thank you.I got stuck trying how to transfer items to the merchant, because I was over-thinking it, lol. I kept dragging the items to the wrong inventory.

Alright, I thought you meant finding a vendor who would take stuff, cause I recall that it seemed like there's a lot of NPCs and only a few you can actually sell things to.