Pay off your credits cards and sell your baseball card collection, because you’re going to want to throw some cash around to try and snag the Nike Air Mag’s that Michael J. Fox wore as Marty McFly in Back to the Future II. Granted, the shoe isn’t in the best condition, given it’s epic role in 80’s film history, but that shouldn’t stop it from reaching a price of up to $15,000. We’re keeping our fingers crossed that they find one of those hover-skateboards to sell. Check out the details, or place a bid here.