Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Model: RK100, Operating Force: 50g-60g, Operating System: for Mac / IOS / Android / Windows XP / Win2000 / Win7 / Win8 / Win10, Net Weight: about 1100g, Connection: Wireless bluetooth5.0 / 2.4Ghz and USB-C wired, Keycap Type: ABS Double Shot Keycaps, Dimension: about 404*159*57mm, Brand: ROYAL KLUDGE, Key Switch: RK Switch (brown switch / blue switch / red switch)
Aliexpress
There’re some similar (or not) items 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. ($32.99): BG0ababc
2. ($36.99): BGed7cb8
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG5e45b7, BGraton, Cityads2213, BGeb39da, BGc0ac93, BGda0154, BG0866e1, BG864638, Cuponation9, BGKBandmos12, BGb5d970, BGff5312, BG985589, BG3dd49f, BGcf924d, BGc7a462, BGbcc8be
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Royal Kludge RK100 Mechanical Keyboard 100 Keys [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for Royal Kludge RK100 Mechanical Keyboard 100 Keys is here.
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)).