I don't have an RV, but I think who you sell your plane to is just as important. I built a Lindy winning LongEZ and a guy who just really wanted a canard got in touch with me. I eventually sold the plane at a very good price. When I delivered the plane to the Left Coast, I taxied up to his hangar and found that the only tool in the hangar was a funnel. When he had a problem with the plane the first thing he did was call me and ask what was wrong with it. So you try to help, but the guy couldn't be convinced to remove the cowling.
So I think there is more to selling an experimental airplane than just a liability release. Make sure the owner embodies the spirit of experimental aviation and wants to learn about the plane and work on it, not just jump in and go like a rental.
MTCW