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 (12.73 USD): Cuponation9
Coupon (13.15 USD): BG00c906
(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): AFfbG10, BGBFAFF2019, BGCITYADS2019, BGBK15, BGBAK15, BG20SST, BG20CES, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BANGGOODSD, BGHOTSHOP15, BG53e9c8, BG1efeb0, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, 9OFFSUMMER
(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 Bakeey 7mm 6LED Android Endoscope? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).