Shops

Merik's
Merik's is a built-in shop to the game which is run by Merik the Scavenger. The items of the shop update regularly each day. More powerful items will be sold at higher levels.

Marketplace
The Marketplace is another shop in the game, however, it is completely run by players. Players can set prices and sell their items.

Guild Bank
This is a bit of an exception. While Guild Bank not being a shop, it is a handy place to store items to everyone's use in the guild.

For every member, 3 slots open in the Guild Bank, with a max of 60 slots. There is no limit to the number of members you can have, however.