Aliexpress
Click here… to search for Emax Hawk Apex 162mm 3.5inch 4S Drone BNF ELRS on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (394.68 USD): BGMatt2022
(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): Cuponation9, BgGoodie9, BGApex10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Emax Hawk Apex 162mm 3.5inch 4S Drone BNF ELRS.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).