Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (41.62 USD): BGTT10
Coupon (42.55 USD): Parts8
(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, f62884, BGCat2MP, c93fe6, BGBCEFCAT, BGCAT2, BGFoxeerCat, BGss10%fox, BGBCFPV, BGfox15, BGBCBG10, BGFOX12, 502C6B, BGOTC21, BGBFCR13
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Foxeer Cat 2MP FPV Camera.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).