When XFX put on sale at Amazon the RX Vega 64, the card sold out in just 12 seconds.
AMD RX Vega also sold out directly at Newegg, but also to other major Canadian stores.
However, as you can see at the Amazon’s product page, user feedback is not very positive, although it is mainly about the price of the product.
In comparison, it is almost as good as the Nvidia GTX 1080, in the latest games (although it is more energy-consuming), but the reason for selling it is certainly ethereum mining, where the card performs extremely well.
So, as is something that happens in such cases, the lack of card and the users’ need for fast cards for ethereum mining, raised the card’s price at $999.