I have a friend who is selling a two year old Rans Rocket recumbent bike. I don't have any details on the condition.
He is also trying to get rid of an ElliptiGo Arc8 which he keeps calling a recumbent bike but looks to me more like something Phil Dunphy would stand on to walk/pedal around the neighborhood during an episode of Modern Family.
He has no idea what a reasonable used price would be for either of these (neither do I)so if you're interested contact him and take advantage of his lack of knowledge.