How can you sell properties in GTA Online?

In GTA Online, to sell properties, players must first own more than one property of the same type, such as apartments, garages, or other living spaces. When reaching the limit of properties one can own and attempting to purchase a new one, the game prompts the player to trade in an existing property. While purchasing the new property, players choose from their list of owned properties which one to sell. The sale price is typically half of the original purchase price and contributes towards the purchase of the new property. It's important to note that not all properties can be sold directly; some (like CEO offices) do not have this option. Additionally, only certain types of properties can be traded in for others—for example, safehouses for safehouses or businesses for businesses—therefore planning is crucial when shuffling real estate in the game.