By Andrew Gould One lucky, and likely affluent buyer could secure an iconic piece of clothing from Joe Namath. Heritage Auctions is currently auctioning a mink coat owned by the former New York Jets quarterback. The current bid is $5,250 as of Sunday morning, but the auctioneer expects the final price to rise to $20,000 or more. Provided by Namath’s attorney, James C. Walsh, the tiger-striped coat features his “JWN” initials embroiled on the inside. The package also included a 1969 issue of Esquire magazine and a football signed by Broadway Joe. Namath led the Jets to their only championship i…