If you're not in a hurry to sell I would stick to your guns as much as you can. Of course people will tell you they can get a newer and lower mileage car for the same money that's true and the way things are going you will be able to buy an SRT 6 for the same money soon and probably can now if you look hard enough .

but the handful of Startech show cars that were prepared in Germany by Startech personally whatever spec and wherever they ended up all over the world are rarer than all other crossfires and deserve respect

extras alone cost a fortune as I have the original price list here -- four wheels at the time cost around £3000, pounds, exhaust £2.500 leather steering wheel £500, carbon centre console £1600, plus gear stick, foot plates, carpets, grill, fins, bumper mouldings, etc etc etc.
So probably £10,000 worth.
I hope it all works out for you lucky but don't be sucked in by people wanting something for nothing