Late Wednesday night, word leaked out that the Nike AMG, affectionately referred to as the “Marty McFlys” based off of the Back To The Future character actually exist and that Nike would be releasing them.

In actuality, yes, the shoes do exist and as of 10:30 CST last night they’ve been going on sale via eBay auction to support the Michael J. Fox Foundation finding a cure for Parkinson’s disease. The bids will end on September 18th.

While the proceeds going to charity are actually great, the bad news for sneakerheads is that only 1500 pairs of the shoe are available so expect bids to be like arms races. If you don’t happen to get a pair, you’re going to have to wait like everyone else will for 2015, when the shoe came out in the movie. Expect someone’s credit card balance to spike over the acquisition of this shoe as even VIPs and Nike reps such as Kevin Durant won’t be able to get a free pair according to the shoe’s designers Tinker Hatfield & Tiffany Beers.

The NIKE MAG is no longer the “greatest shoe never made.” The mythical shoe that originally captured the imagination of audiences in Back to the Future II is being released – and they’re here to help create a future without Parkinson’s disease.

1500 pairs of the 2011 NIKE MAG will be auctioned on eBay with all net proceeds going directly to The Michael J. Fox Foundation. Each day for the duration of the ten-day auction, one hundred and fifty pairs of the 2011 NIKE MAG shoes will be made available via eBay’s Fashion Vault. The auction starts September 8, 8:30PM PST, and will end September 18. Thanks to a previous 50 million dollar match given to the Michael J. Fox Foundation, all donations will be matched, effectively doubling the contributions from the auction.

The original NIKE MAG was worn by the Back to the Future character Marty McFly, played by Michael J. Fox, in the year 2015. It came alive, lit up and formed to Marty’s foot. The 2011 NIKE MAG shoe was designed to be a precise replica of the original from Back to the Future II. The aesthetic is an exact match, down to the contours of the upper, the glowing LED panel and the electroluminescent NIKE in the strap. The 2011 NIKE MAG illuminates with the pinch of the “ear” of the high top, glowing for five hours per charge.