FHD+, OS Android 9.0 (Pie), ROM 128GB, Octa-core (2×2.3 GHz Kryo 360 Gold & 6×1.7 GHz Kryo 360 Silver), 19.5: 9 ratio (~402 ppi density), 16M colors, RAM 8GB, Type Super AMOLED Screen Texture, Resolution 1080x 2340 pixels, CPU Snapdragon 712 AIE(10 nm), Display Size 6.4 inch, planned upgrade to Android 10.0; ColorOS 6, Dew-drop Fullscreen, 101.0 cm2 (~84.7% screen-to-body ratio), GPU Adreno 616.
Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
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 price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. I couldn’t find any coupon for this product on latest product update.
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!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGRMXT8128, od7off, 7bcdf9, Email5, BGXTDJ01
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Realme XT 8/128GB is here. The lowest price was: $248.56.
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)).