Aliexpress
Click here… to search for Motospeed CK888 Mechanical Keyboard + Mouse on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (53.09 USD): BGHONEY2110
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 51ff8c, 502C6B, TTxBG10, e18b44, BGss506, bgssaff9, BGCPP007, AFfbG10, BGCPP026, BGCPP024, BGCITYADS2019, BGVDay10%off, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgcLuBofErtA10, 7d18f7
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Motospeed CK888 Mechanical Keyboard + Mouse.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).