It's a 1:500 variant. Assuming 50% discount, stores pretty much had to buy 500 copies or $997.50 worth of the regular covers in order to qualify to purchase the B&W variant. The premium pricing is partly to offset the costs for all the ANW #19 regular covers that will likely need to go to the dollar bin.
It was also featured here:
https://comicbookinvest.com/2017/04/05/the-elite-one/
I'm sure that America #2 variant is also fetching a pretty penny on ebay.