We've just added the /sell command on /survival. To sell items, simply do /sell, put the items you want to sell in the chest, and click the confirm button in the bottom right.
You can only sell items that you are also able to sell at /spawn.
Any items you sell with /sell will give you slightly less Rift Coins than if you had sold it in the shop at /spawn.
Feel Free to ask our staff any questions you have about this new feature!