https://www.newegg.com/Product/Product.aspx?Item=9SIA73M5RB6419 lowest cost for an IN STOCK RX 470/480/570/580 on Newegg right now - but the price gouge is INSANE, they want more for that than for some GTX 1080 cards.
NVidia gotta be LOVING this....
The Vega Frontier edition is supposedly going to be out in June or early July - but that's the WORKSTATION version, not a consumer one, and will probably be priced accordingly.
The consumer Vega cards are due later this year, apparently.
500 bucks :DDDDD Who wants my RX 480 8GB? Just 489 bucks

I'm not sure why everybody is excited from Vega? It should be high-end like Fury, so it will cost fortune and also HBM has pretty bad timings. That's what makes all AMD cards good for mining and all those bios mods are about.