Yes, you can sell your Domin, provided it is a Tezos domain name. Tezos domains are digital assets that are registered on the Tezos blockchain and can be used to create a unique, memorable web address. You can sell your Tezos domain name on a number of digital marketplaces, such as OpenSea, that specialize in the digital asset trading. Before selling your domain, make sure to check the terms and conditions of the marketplace to ensure that you are in compliance with their rules and regulations.