Here is one for those of you that know your vintage cars.  How much is a Gull Wing Mercedes worth?  This one is kept in the Lyon Air Museum in California.  It seems to be in great condition and I assume it is worth quite a bit but I have no idea how much.  It was tucked in amongst lots of valuable aircraft so is not the most expensive thing on display.  Since the planes are generally airworthy, I would guess this is a runner too.