Aliexpress
Click here… to search for Flir C2 Professional Thermal Camera on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (687.22 USD): BGherra
(CouponsFromChina.com tip: this code has to be applied 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): e2bcea, 502C6B, 36e77d, TTxBG10, BGTR15, AFfbG10, BGVDay10%off, BGMPB2020, BGAFF10OFF, bGhOnEy10, 7d18f7, BG11SHOP
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Flir C2 Professional Thermal Camera.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).