The New York subways are a cultural touchstone. Think of Gene Hackman in The French Connection, Elaine on Seinfeld, or Harry Cat in The Cricket in Times Square. While you can’t visit New York as often as you can watch it on TV, you can own an artifact of the century-old system, as the old Redbird trains go into retirement and into the chop shop. At www.transitmuseumstore.com, metal hand straps (called Grab Holds) cost $20, and a conductor’s horn is $62.50.