According to my DB the lowest price is 616.39 USD for Imaging Camera (in Banggood). Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood (616.39 USD)
Banggood warehouse is located in China. Is it good price? Well, this price is higher than average price (611.79 USD) Nice, I’ve got 2 active coupon codes for you!
Link: Banggood product page
Price without coupon: 669.99 USD
Coupon (616.39 USD): BGSPRING8OFF
Coupon (616.39 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): BGBFDAY8, BGNEWYEAR8
(you can check these old coupons out, but these probably won’t work)
Aliexpress
Click here… to search for TTS300 Thermal Imaging Camera Monocular 256x192px on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for TTS300 Thermal Imaging Camera Monocular 256x192px is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).