You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Model：K39, Read Speed: up to 150MB/S., Brand：STmagic, Interface：USB3.0, Write Speed: up to 80MB/S., Speed:
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
USB Flash Drive Photostick High Speed Sticks External Storage Pen Drive For Phone iPhone Android PC Copy Photo Videos Files | $9.73 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
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): BG2eb46d, BGbc7d87, hoNEYbGdeAlS, BGHU2343, BGfd1a2f, BGae326d, BG589b2e, BGc209d1, BGMARCHSALE
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for STmagic K39 2 in 1 USB 3.0 Type-C USB Flash Drive 512GB.
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)).