You can create price alert here, copy coupons and view price history. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Product weight 87g±2g, Brand NEXTOOL, Product Size 75x20x19mm (closed), Main material 30Cr13 / 2Cr13 / ABS, Product Name Multifunctional mini knife
Banggood
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood).
Link: Banggood product page
Price: $-3
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGadffcf, BGfbec0e, BGbb6698, BGe89743, BG738887, 00c906, BG99dbac, BGe46870, BG3e2361, 8Couponsde, 8BGwbg2204, BGae7e10, 2203ActiesNL, tRaDetRaCKeR, BG2bb7a1, BG5d2ea4, TTSUMMER8, Cuponation9, BG589b2e, Sports23q1, BGc28268, BG9dce6b
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for NEXTOOL 10-in-1 EDC Multitool.
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)).