Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Professional Industrial HD Borescope with 2.4 Inch LCD 5.5mm 3m [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGTDL01, BG93dc4d, BGe52d22, BGTools8, BGCL88, BGGines
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Professional Industrial HD Borescope with 2.4 Inch LCD 5.5mm 3m [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for Professional Industrial HD Borescope with 2.4 Inch LCD 5.5mm 3m.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).