Offtrade - an offline trading system. Any character can optionally fill their Personal store, set the currency for which they will sell (Jewel of Bless, Jewel of Soul, Jewel of Chaos, WCoinC, WCoinP, Goblin Points, Zen) and click on the button with the desired currency in the Personal store. By standard, things are billed for Zen.
For sale for stones, the character must have a place in the backpack under the specified number of stones. Selling for xen is similar. Not more than 2,000,000,000 zen.
You can also put on sale for ZEN without offline, for this you need to set a thing, set a price and open a store.
Do you want to immediately swing and sell things for Zen?
No question, open a regular store (see above) and press the offexp button. (This command will not be available in the safe zone of any city and at events).