Number of keys: 68 keys, Keyboard size: 310x102x39±2mm, Brand: Royal Kludge, Switch type: blue/red/brown/black switch, Product name: bluetooth mechanical keyboard, Color: black / white, Model: RK855.
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Aliexpress
I could not find it on Aliexpress. 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. Well, there is one coupon available right now.
Link: Banggood product page
1. ($34.99): BGc7abcd
this code has to be applied in your 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): BGRK855, bGhOnEy10, BgcLuBofErtA10, BGAFF10OFF, BGCNRK855, BGCuponation10, 13f142, BGHONEY2110, BANGGOODSD, BGRiccardo, BGraton, Cityads2213, BGf397dc, BGc0ac93, keyboardMVC, BG282578, Cuponation9, BGKBandmos12, BGd71c1d, BGff5312, BG892c83, BGf7119b, BGcf924d
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Royal Kludge RK855 Bluetooth 68 Keys Mechanical Keyboard is here. The lowest price was: $29.99.
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)).