I agree big time, my car is a minted 56plate roadster 10,000miles & is worth less than 50% of what I paid for it new. have seen photos of your car & I am impressed.
If I didn't have mine I would buy it but only because it/s triptronic as in my opinion the manual gearboxes are "SH--E" Unfortunately can't help you on what it's worth.
"Sarnie" has been very honest!!!!