I have just checked coupons. The lowest price I could get is 367.99 USD for 320×240 Thermal (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest price update (UTC time):
Banggood (367.99 USD)
Banggood warehouse is located in China. You probably want to know if this is a good price. Well, this price is higher than average price (348.99 USD) Only one coupon available!
Link: Banggood product page
Price without coupon: 399.99 USD
Coupon (367.99 USD): BGHONEYSP
(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): BG7618b6, BGGines, BGf5657a, BGdanOFF11, BG1382ee
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – TOOLTOP ET692D 320×240 Thermal Imager [EU] (-3 USD)
Aliexpress
Click here… to search for TOOLTOP ET692D 320×240 Thermal Imager on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for TOOLTOP ET692D 320×240 Thermal Imager.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).