What should we think of a car whose finest features are best appreciated while it is parked? One whose appeal lies principally in the image of him or her an owner thinks it likely to project, with the driving experience demoted down the priority list to a rather distant second? Knowing you lot, not much. Such a car is the Aston Martin V12 Speedster, on sale now for £765,000 and with a handful of the 88 units that will be built still to be sold.