Aliexpress
Click here… to search for SUNMI V2 Handheld Thermal Printer on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (215.21 USD): Cuponation9
Coupon (217.57 USD): hoNEYbGdeAlS
Coupon (217.57 USD): DealBGimpact
Coupon (222.30 USD): BG00c906
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGd3d3e2, 00c906, BGaf08a8, BG1a0abd, BG608f56, 2022ACTIESNL, 2203ActiesNL, BG1efeb0, MVC8SPRING, 8BGwbg2204, 8wEbgaInS5
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for SUNMI V2 Handheld Thermal Printer.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).