Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (48.72 USD): AFfbG10
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): TTxBG10, BGss506
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Hubsan X4 Camera Plus H107C+ Quadcopter .
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).