1 - Click on your wallet on the top right corner in Cometh Marketplace
2 - Click on “View profile”
3 - Click on the spaceship you would like to sell
4 - Click on “Sell”
5 - Set a selling price in MATIC
6 - Click “Confirm approval”
7 - Now it is listed for sale.
8 - Wait a little until someone buys it
Congratulations Crew Member, you successfully sold your Spaceship.