Aliexpress
Click here… to search for Huawei Honor 10 6/64GB on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (385.36 USD): Email5
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 8BGH1064, 9BGH1064, 1225CAR, affiliate6, aff7off, bgssaff9, od7off, BGaDmITAd, 7bcdf9, BGBFAFF2019, BGCITYADS2019, BGMPB2020
(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 Huawei Honor 10 6/64GB is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).