Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Router AX1800 [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (72.99 USD): BGN0561HK
Coupon (76.49 USD): BGHONEY2110
Coupon (83.99 USD): 13f142
(CouponsFromChina.com tip: you should apply the coupon in your 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): BGN613G, BGNT13S, BGN713P, BGN71223, BGdragonBoat, bGhOnEy10, BGND13, BGN813D, BGAX1800, bgshOOp10, BGN913K, BGN913A, BGN93ZE, BGN913E, BGN913Q, BgoFErTaSchInA10, BGN103O, BgcLuBofErtA10, BGN13HYR, BGN13HYb, BGN1213CZ, BGNLP061, BGN113XY, BGAFF10OFF, BGN0161HK, BGN0261AU, BGNDS10OFF, BGCuponation10, BGN0361K, BGN461J, BGN0561A, BGN0661S, BGN0861H, BGN0861HU, BGN0961RU, BGN0961CZ, BG6bcdca
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Router AX1800 [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Router AX1800.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).