1. Click on "Sell" at the main page. Register yourself an account to become a seller if you haven't already. ( read more details here )
2. Select the Game and Services you want to sell. Fill in ALL fields and make sure all information is correct. Click "Submit" after you have read and agree to our Terms of Service. (If you haven't complete the listing audit, you should submit a listing application. read more details here )
3. If you want to make any changes to your listing, select "Offers" on the menu and click "Active Offers".
4. At the Manage Listing page, you will be able to make any necessary changes to your listings, including deactivating or removing it.