Several players, including myself, have accidentally sold high value items such as high quality crew contracts, legendary drones, and high level parts that we have worked a long time to acquire. While there is a confirmation menu for selling crew contracts, clicking though the menu can become automatic when you have done it a lot of times. There should be an undo period to restore these items in case it is accidental. There could be an "undo transaction" tab in the hire crew and salvage yard menus where recent sales are listed. They could all be removed when a player makes a gem purchase, in order to prevent the stress of people using this system to take out loans on collateral and rushing to pay them back. There should also be a confirm menu when selling high value, high level, or exclusive parts, and there should be a confirm menu for selling ANY drone. There should be a special confirm menu with 15 seconds or so time delay for any purchase of over 500 gems or so, including hangar purchases, ship painting, and instant drone evolving. This will force people to carefully review transactions before automatically confirming them. This time delay confirm menu should also display when attempting to sell a high value 5-star drone, or possibly any 5-star drone.