Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (53.95 USD): tRaDetRaCKeR
Coupon (53.95 USD): 8wEbgaInS5
(CouponsFromChina.com tip: this code has to be applied in your 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): BGGeniusExtrusor, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG21032a, 6GSGIT
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Artillery All-in-one Single 3D Printer Extruder Kit? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).