Video Memory Frequency: 7000MHz, Video Memory Capacity: 4GB, Memory Bus Width: 256Bit.
Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($222.70): AFfbG10
2. ($227.44): Wholesale20
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): TTxBG10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Yeston RX580 Graphics Card is here. The lowest price was: $194.17.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).