Cable Length (m): 1.8 m, Interface: USB 2.0, Key Number: 104, Keyboard Lifespan (times): 500 million times, Response Speed: 3ms.
Price history, coupons and price alert are available on this page. What is the best price?
Aliexpress
I could not find it on Aliexpress. 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.
Link: Banggood product page
1. ($52.19): AFfbG10
2. ($53.93): aff7off
just apply this code 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): 24f401, 4d8a18, e2bcea, 502C6B, 19b864, TTxBG10, e18b44, BGss506
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Xiaomi Gaming Keyboard is here. The lowest price was: $48.44.
Price records source(s): Gearbest, 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)).