Can't sell gold/silver chests on market

I would just like to say that you can't sell gold/silver chests (and enhancement stones) on market!
When you go to marketplace and treasures and "choose threasure" and you go to the bottom then you can choose gold/silver chests and enhancement stones, but there's no way that you can sell them!
Fix it please!

[support1]

To my knowledge, enhancement stone, gold chest and silver chest cannot be traded on the marketplace.

He's correct with them being an option to purchase on the market however.

Yeah there is an option to buy gold silver chests and enhancement stones on market, will we ba able to sell them or only get them with coins? (: