Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (42.49 USD): tRaDetRaCKeR
Coupon (42.49 USD): 8wEbgaInS5
Coupon (42.49 USD): pROMo8cuPoN
Coupon (42.96 USD): 2203ActiesNL
Coupon (43.42 USD): BG00c906
(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): BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BGd0b05d, 00c906, BGe46870, 2022ACTIESNL, Terence, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Baofeng BF-T9 Walkie Talkie is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).