Strix is usually considered one of the best looking and best performing models so it's rare to see a Strix at the lowest end of the pricing range for a graphics card. And currently the RX 570 is the best bang for buck card on the market so this seems like a fantastic deal for 1080p gaming.
Note it has been slightly cheaper in the past
Other Notable Deals:
RX 580 4GB $269 delivered @ PLE Computers or $239 pickup or up to $21 delivery from Umart Thanks Hinee.
RX 580 8GB $312.55 @ Computer Alliance eBay
GTX 1060 6GB $319.20 @ TechFast eBay
It also came with three awesome games previously.