I responded to a Wanted Ad with a plane that the buyer wants. I did not list my plane on RCU at all. We've corresponded via email, settled on a price, etc., and the buyer wants a formal invoice from RCU. I cannot find out anywhere on RCU as to how to do this. Maybe one cannot generate an invoice for Wanted Ads?? Not to mention how to link Paypal to it. My answer was to just reply to the ad and type in the terms that we agreed upon. Any advice would save the hair I'm pulling out of my head right now. Thanks!!