When I was updating this page the price was $15.99 for 1800Mbps Wifi6 Wireless Network Card AX1800 (in Banggood). Just check coupons out (with price alert and history). Best price?
1800Mbps Wifi6 Wireless Network Card AX1800 Dual Band USB3.0 Adapter Wifi Receiver WiFi Dongle
Latest coupon and price update (UTC):
Banggood ($15.99)
Banggood warehouse is located in China. Coupons for 1800Mbps Wifi6 Wireless Network Card AX1800? Nope, there’re no coupons in Banggood. The question is – is it a good price? Well, according to CouponsFromChina database this price is the best in history (2 records).
Link: Banggood product page
Price: $15.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGd1ae4a, BG589b2e, BGc209d1
(system checks these coupons on every price check (like once per 24 hours), but you can check them 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
Do you need price history chart (for all/most countries) for 1800Mbps Wifi6 Wireless Network Card AX1800? There we go.
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)).