405ppi, GPU Adreno506, Display Size 5.5 Inch, RAM 4GB, Type FHD AMOLED Capacitive Touch Screen, CPU Snapdragon 625 Octa core, OS Android 7.1, ROM 64GB, Resolution 1080*1920 pixels, Multitouch Yes, 2.0Ghz, Card Extend Supports an external Micro SD card up to 128GB (VFAT).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($169.99): 11BGS9
you should apply the coupon 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): 10BGS9
(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 Hisense S9 CN 4/64GB Black is here. The lowest price was: $134.99.
Price records source(s): 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)).