When I was updating this page the price was 609.99 USD for Inch Drone (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
Banggood (609.99 USD)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. But wait a sec… Is it a good price? Well, this price is higher than average price (550.27 USD)
Link: Banggood product page
Price: 609.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGeee605, BGToys8, BGMatt2022, BG589b2e
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
Click here… to search for iFlight Defender25 HD F7 4S 2.5 Inch Drone BNF with DJI O3 on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for iFlight Defender25 HD F7 4S 2.5 Inch Drone BNF with DJI O3.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).