Aliexpress
Click here… to search for DJI Transmitter for DJI Mavic 2 Series RC Drone on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (912.81 USD): Parts8
(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): 23caee, 502C6B, TTxBG10, BGss9%rc, bgssaff9, AFfbG10, BGDJISmart, BGBFAFF2019, BGCITYADS2019, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, BGRC902, BgoFErTaSchInA10, BGDJIRC12, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for DJI Transmitter for DJI Mavic 2 Series RC Drone.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).