It took 10 months to build the car. When Rolls-Royce was ready, its total cost was £6,500 ($7,948), of which £4,500 ($5,503) had been spent on the interior. It was a pretty huge sum at that time as you could buy a house for £500 ($611).Today the car is put up for auction which will take place on December 4 and is expected to be sold for £700,000 ($856,065).