According to my DB the lowest price is $10.99 for 600Mbps WiFi USB 3.0 Adapter 2.4G/5GHz Wireless Wi-Fi Dongle (in Banggood). You can create price alert here, copy coupons and view price history. Best price?
Latest coupon code price check (UTC time):
600Mbps WiFi USB 3.0 Adapter 2.4G/5GHz Wireless Wi-Fi Dongle Network Card Receiver for PC Desktop Laptop
Banggood ($10.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. But wait a sec… Is it a good price? Hmmm, price is higher than average (which is $10.54 right now), so better set price alert down below…
Link: Banggood product page
Price: $10.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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 600Mbps WiFi USB 3.0 Adapter 2.4G/5GHz Wireless Wi-Fi Dongle.
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)).