Paul Thurmond: "The undercarriage of the wrecker is unique." Bill Brumbach: "I think it's the same as the one on the 730 Carrier and Steam Shovel" Dave Micklon: "No one else wants to buy this? A classic; willing to pay decent money. UPDATE: Got it for dirt cheap (Boxed, mind you) on eBay. Good set, as promised." John Kustak: "No Box/Instr"