Aliexpress
Click here… to search for Blackview BL8800 Pro 5G Thermal Camera Dim700 8/128GB 8380mAh on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (518.69 USD): Cuponation9
Coupon (518.69 USD): BgGoodie9
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): BGHU2361
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Blackview BL8800 Pro 5G Thermal Camera Dim700 8/128GB 8380mAh? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).