Passenger seat rides, unless you know the buyer, they are licensed, insured, and experienced riding Spyders. Nothing good can come from letting an inexperienced, uninsured rider taking your bike for a spin unless you have the money in hand. Spyders are unique in handling. Most first time riders, especially long time 2 wheelers, are not comfortable with their first Spyder experience.
I know others will say they would never buy any vehicle without a test drive. But, trusting someone unknown with a machine they are not familiar with is a recipe for disaster. Test drives happen ONLY after it is agreed that your Spyder handles and rides correctly and you have your money in hand. Good luck with your sale..... Jim