Connection bluetooth 3.0 + USB, Backlit RGB Backlit, Battery Capacity 1000mAh, System Support Windows /Android/Mac OS, Weight 800g, Model RK71, Voltage 12V, Material ABS, Keys Amount 71 Keys, Size 327 * 101 * 36mm.
Just check coupons out (with price alert and history). 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($43.99): BGc0ac93
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGRK71R, AFfbG10, BGBFAFF2019, BGCITYADS2019, bGhOnEy10, BGSS10%SW, BGdhjeia, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCNPRK71, BGCNRK71, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Royal Kludge RK71 Bluetooth Mechanical Keyboard RGB [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Royal Kludge RK71 Bluetooth Mechanical Keyboard RGB. The lowest price was: $47.99.
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)).