Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (41.03 USD): BG589b2e
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG28b388, BANGGOODSD, 00c906, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGWSCYT1, BG57301a, BGde2f67
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Wavlink AC1200 Dual Band Gigabit WiFi Router is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).