# Trade
A marketplace to buy and sell NFTs will be launched on all chains that CKST is deployed on.
**Key attributes:**
* A seller only needs to sign an approval message in order to list a Gun for sale (no transaction or transaction fee is required).
* The seller can also indicate an expiry time for their listing. If no suitable offer is made by the expiry time, the listing will be automatically cleared from the marketplace.
* The buyer will need to make a transaction to buy a listed item.
* If a seller wants to cancel their listing before the expiry time, they will need to make a transaction.
The primary currencies are CKST and the specific marketplace chain currency. Holders of CKST will be entitled to a VIP tier fee discount in the generalized cross-chain marketplace in the future. For NFT contracts with data storage, on-chain techniques will be utilized to facilitate the transport layers required for data transfer when moving the NFT across chains.\
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