I'm with a team working on a new site for drone pilots to buy and sell new and used drones. The site is called DroneMarket.co. We think this service could be valuable to the UAV community. For one, sellers won't have to pay commissions on their sales. And second, listing drones and searching listings will be centralized and much simpler than searching through the different classified sections of existing forums.
We'd appreciate your feedback - what do you think? If you want to sell a drone or know when we launch, you can sign up at DroneMarket.co.