Aliexpress
Click here… to search for Digoo DC-K4 3D LED Digital Clock on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (16.55 USD): BGss8%hl
(CouponsFromChina.com tip: apply code in your basket (cart) 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): 50DGPO, 20DGK4, 15HGA, BGRU798, 0404digoo
(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 Digoo DC-K4 3D LED Digital Clock is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).