Dimensions 10 × 84 × 82mm, Wireless Security “WPA-PSK
WPA2-PSK”, WiFi Speeds “5 GHz: 867 Mbps (802.11ac / 2*2 @80MHz)
2.4 GHz: 300 Mbps (802.11n / 2*2 @40MHz)”, Model RA75, Ports 1*10/100 Mbps Ethernet Port, Buttons “1 * WPS Button
1 * Reset Button”, Color Black, Operating Temperature 0-40 °C, Modes “Range Extender Mode
Access Point Mode”, Input 100~240V / 50/60Hz / 0.3A, Standards “IEEE 802.11ac/n/a 5 GHz
IEEE 802.11n/b/g 2.4 GHz”, Plug Specifications EU plug, RAM 64MB, Brand Xiaomi, Transmission Power “<20 dBm (2.4GHz)
<23 dBm (5GHz)".
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($36.65): BG589b2e
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGSAC1200M, BGS2099M, BANGGOODSD, BGecd0b8, BG15ff01, BGbff3d8, 00c906, BG577e1f, BGabd957, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BGe01c48, 8Couponsde, BG3a7cbf, BGf50567, pROMo8cuPoN, BGXC10391, BG17878b, BG2f1c51, BG57c27e, BG0cdab3, BG25193f, BG452ced, BG4dc174, BGsmartbuy4s, BGDealkal6h, BG1270cb, BGc02841, BGb9e42c, BGWSCYT1, BG2f5ad6, BGde2f67
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Mi RA75 AC1200 WiFi Range Extender. The lowest price was: $20.99.
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)).