Aliexpress
Click here… to search for Easythreed K7 Desktop Mini 3D Printer on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (119.59 USD): BGSPRING8OFF
Coupon (119.59 USD): BGHONEYSP
(CouponsFromChina.com tip: you should apply the coupon 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): 7d18f7, 13f142, BG85b3c8, ADMITAD2212, 2022ACTIESNL, 8Couponsde, MVC8SPRING, BGSaleAD, BGMARCHSALE, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8, BG8298aa, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Easythreed K7 Desktop Mini 3D Printer? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).