Estimated retail price: $179
Estimated resale value: $9,900
Value increase: 5,530%
Nabbing the spot as the pair with the highest resale value, the Nike MAG sneakers were based off the pair worn by Marty McFly in the 1989 film "Back to the Future Part II."
Conway said that the high resale value of this specific pair is because of the limited edition add-ons, such as the Nike Mag Plutonium display case, which includes a charger, special edition T-shirt, commemorative Nike Air Mag pin, paperweight, commemorative booklet with DVD, and Tinker Hatfield drawings.