Just check coupons out (with price alert and history). Let’s see what best price is ATM.
000 pixel, Temperature Measurement Range: -20℃~300℃(-4℉~572℉), Storage Environment: -20℃~60℃, Duration: 2-3 hours, Material: ABS, LCD Resolution: 320*240, Measurement Accuracy: ±2℃/±2%, <85%RH, Shortest Focusing Distance: 0.5m, Power Supply: Rechargeable 18650 battery, German, Model: WT3320, Item Weight: Approx. 332g / 11.71oz, 000 images stored), Automatic Power-off: 5mins / 20mins / manual shutdown (Switchable), Package Size: Approx. 26.2*13.2*9cm / 10.31*5.2*3.54in, Plug: EU, Frame Rate of Thermal Images: 9Hz, Visible Image Resolution: 300, Emissivity: Adjustable from 0.01 to 1.00, Brand: wintact, Infrared Image Resolution: 320*240, Item Size: Approx. 22.5*8.9*6.7cm / 8.86*3.5*2.64in, Color: Red+Black, Display Screen: 2.8" full angle TFT display screen, Italian, File Format: JPG, Language: English, Wavelength Coverage: 8-14μm, Storage Capacity: Built-in 3G (above 20, Package Weight: Approx. 968g / 34.15oz, Working Environment: 0℃~45℃, Chinese, <85%RH
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($528.27): BGherra
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 and https://couponsfromchina.com/short/5cd
Price history and price alert
Check out price history chart (for all/most countries) for WT3320 Thermal Imager 320×240.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).