Use coupon and get MUSTOOL M2 Dual-angle Infrared Thermal Imager 256×192 for 219.99 USD (from Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood (219.99 USD)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. But wait a sec… Is it a good price? From what I can see this price is higher than average price (217.96 USD).
Link: Banggood product page
Price: 219.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGHONEYSP, BGf0c5e1, BGc610f5
(probably won’t work, but you can try them out)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for MUSTOOL M2 Dual-angle Infrared Thermal Imager 256×192 is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).