Basically copy coupon, view price history or create e-mail price alert. What is best price?
FrSky TWIN X-Lite Radio Transmitter Built-in Dual 2.4G Band Internal RF Module Remote Controller 3.5-Inch Colour Touch Slide Screen Support ETHOS System for RC Drone – FCC Version
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
FrSky Controller Twin X-Lites Transmitter with Built-in Dual 2.4G Band Internal RF Module for RC Model | $518.07 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($370.29): BGMatt2022
2. ($370.29): BGMARCHSALE
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGRADIORU, BGToys8, BGSaleFeb8, BGSaleAD
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for FrSky TWIN X-Lite RC Transmitter.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).