You can sell your own items in a booth.

Booth: It is very convenient to trade between players

You should set a price before keeping a booth. While setting a booth, you can’t move, perform skills or conduct P2P trade but you are able to chat with other players. The booth is only available in a public trading area. Teleportors in towns can help you get there. It’s a neutral zone for booth trade where PK is forbidden.
There are only 15 grids to display items for sales.

Teleportors in towns will send you to Market.

You can set up a booth once you arrive there. Just open your backpack and click Booth.

Put your items in the booth.

You must set a price to each item.

Give a price to each item and then click Booth. You can start your business in no time.

Teleportors in market will help you back to main towns.