You'll earn some income after a success trade. But certain amount of trading fees will be applied beforehand.
Consignment fee is paid by stones. 200 stones every hour. The minimum consignment hour is 8 hours, which means you need to pay at least 1600 stones. Meanwhile, there's no refund even if the trade failed.
Purchase handling fee:
When an item is sold successfully, system will deduct 10% handling fee according to the transaction price. You can check your earnings and claim them。