Auction is a selling procedure arranged by means of open sale. Auctions are commonly carried out at time and places announced beforehand with customers enabled of lot preview. Japan is a platform for over 100 vehicle auctions situated in all Japanese prefectures. Remarkable distinction of Japanese auctions is an efficient system of presales vehicle inspection, as well as reasonable auction dealing regulations. All vehicles are thoroughly inspected before putting up for auctions; auction sheet is filled out for each vehicle describing its characteristics, properties and condition. Each vehicle is marked with a specific number to indicate it during the sales. Detailed sales data specified by vehicle maker, options, appearance, year, mileage, or color gives unique possibility to forecast contemplated price of a particular vehicle.