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 (29.00 USD): bGhOnEy10
Coupon (29.00 USD): BGFCA15
Coupon (29.00 USD): BgoFErTaSchInA10
(CouponsFromChina.com tip: you should apply the coupon in your cart 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): 502C6B, 150898, b6f55c, e2bcea, elec, 5948dc, BGworldbuy23, 2019SPEDM, camera15, AFfbG10, BGMPB2020, BGdragonBoat, bgshOOp10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for GUUDGO GD-SC03 1080P IP Camera White? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).