To sell ships in Starfield, you need to go to a Ship Services Technician vendor found at major settlements and spaceports. Important steps include:

• You must have more than one ship because you cannot sell your Home Ship (the one designated as your main ship).
• If the ship is stolen or captured, you must first register it with the Ship Services Technician by paying a registration fee, usually around 85-90% of the ship's value.
• To sell, talk to the Ship Services Technician and select "Let me see what ships you have for sale."
• Switch the menu from Buy to Sell.
• Find the ship you want to sell, select it, and confirm the sale.
• If the ship is your Home Ship, you need to switch your Home Ship designation to another ship before selling.

This process ensures you can legally and successfully sell ships, including those obtained through piracy after registering them and deselecting them as your Home Ship.