I might be trading one of my bikes for a Windsor Carrera Sport that is supposedly near mint condition with only one owner. The description includes "I have a very rare windsor made in mexico in 1973 with cinelli copy some of the best bikws were made there. Suntour gt group with sunshine hubs. Almost mint columbus italian steel also." I don't know a whole lot about vintage windsors or the quality of the tubing and stuff, but what would something like this in this condition maybe be worth?