Board Thread:Questions and Answers/@comment-26494666-20160212181401/@comment-24722167-20160212225626

Daros is indeed the best place to sell items but only when allied with barbarians (you can sell items to them at 80% of their value there). However, not being allied with Barbarians makes this the worst shop in the game and knocks the price down drastically to just 30%. (They also charge items to you at a whopping 160% of their value)

The second best place to sell items is with the Nomads just up north from Daros (75% of value). You don't need to be allied with Barbarians either.

And just in case you are wondering who offers the best items to you and at reasonable prices - it's the Yrm shop. Not only can you buy items there at almost their exact value (105% whereas most other shops charge around 120%) but they can also sell the rarist of items and have a good chance of getting them in stock, too! Amusingly, they're also among the worst shops in the game when it comes to taking items from you - they buy items from you at just 30% of their value.