Realme X2 Pro 8/128GB CN Blue (Banggood, Aliexpress: planned upgrade to Android 10.0; ColorOS 6.1, Resolution 1080x 2400 pixels, Octa-core (1×2.96 GHz Kryo 485 & 3×2.42 GHz Kryo 485 & 4×1.8 GHz Kryo 485), RAM 8GB LPDDR4X, ROM 128GB UFS 3.0, GPU Adreno 640 (700 MHz), CPU Snapdragon 855 Plus (7nm), Display Size 6.5 inch, FHD+, 103.5 cm2 (~84.9% screen-to-body ratio), OS Android 9.0 (Pie), 20: 9 ratio (~402 ppi density) (the best price with coupon)).
Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG11X2P8128, BGBFAFF2019, BGCITYADS2019, od7off, 7bcdf9, Email5
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Realme X2 Pro 8/128GB CN Blue. The lowest price was: $449.99.
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)).