The coupon price for GT13 Plus Mini Keychain Flashlight is $14.08 (in Banggood). Price history, coupons and price alert are available on this page. Best price?
BIKIGHT Mini Keychain Flashlight LED TYPE-C Fast Charging Multi-function IP65 Waterproof Fluorescent Magnetic Camping Flashlight – GT13PLUS
Latest coupon and price update (UTC):
Banggood ($14.08)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Good or bad price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $13.52)
Link: Banggood product page
Price: $14.08
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BGd57765
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for GT13 Plus Mini Keychain Flashlight.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).