Do you have the details of your Cayman?
It's a 2011 one, 60k miles, was £26k in a private sale with the transferable warranty until next March. Has pretty much all the options fitted: dual clutch auto (PDK); active suspension (PASM); switchable exhaust (PSE); sports mode for the gearbox/throttle/suspension (Sport Chrono Plus); bi-xenons with cornering function (PDLS); adaptive sports seats and the common options like heated seats, nav, cruise control, parking sensors etc.
With plenty of options available it's worth test-driving examples with/without the various ones to see if they're necessary and worth any price premium or not.