If you are looking to sell a used air conditioner, several options exist depending on whether the unit is still functional or if you are looking to scrap it for parts and metal.
For units that still cool effectively, you can usually get a better price by selling directly to another user or a specialized refurbisher.
Services like HVAC Recycle or I Buy Scrap Recycling focus specifically on HVAC equipment and may handle the freon removal for you while still paying for the unit.
Companies like Cashify or CashOnPick specialize in purchasing used electronics and appliances, often providing instant quotes and doorstep pickup.