I have a Pittsburgh Steelers Bachmann HO Set that although purchased a number of years ago has never been used. It has a total of 11 cars which includes two engines, 6 Dome Passenger Cars, a box car, a flat bed with search light and caboose. Has the power pack along with 15 straight pieces of EZ-Track, 16 curved pieces of EZ-Track, a EZ-Track Coupler and 3 EZ-Track switching tracks. Trying to determine what the value of the set might be? Can anybody out there provide any insight? Thanks in advance for any help. PS I have the certificates of authenticity the cars.