Making a lot sneaker news headlines in recent months, an original Nike Air Mag shoe is available to bid on over at Profiles in History. Worn by actor Michael J. Fox as Marty McFly in 1989's Back to the Future Part II, the Air Mag gained instant popularity due to its futuristic self-lacing system. Profiles in History cites this pair as a walk around prop from the movie, and values the item somewhere between $12,000 and $15,000. The Air Mag recently made headlines when it was discovered that Tinker Hatfield requested a patent on particular technological elements of the shoe last year. Additionally, independent inventor Blake Bevin has recently been hard at work creating her own version of the self-lacing shoe. Is there an Air Mag release in our future?