Data Transmission & Charging Interface: USB Type-C, Operating Temperature: -10°C~60°C (14°F~140°F), Module: TANDEM XE, Dimension: 345*262*82mm（L*W*H）, Battery Bay Size: 86*61*20mm（L*W*H）, USB Adaptor Voltage and Current: 5V+0.2V / >2.0A, Weight: 1357g（Battery Excl.）/ 1492g（Battery Incl.）, Brand: FrSky, , Main 4.3” Touch-Screen Display Resolution: 800×480, Operating Voltage Range: 6.5 ~ 8.4V (2S Li-battery), Number of Channels: 24 channels, Built-in Flash Storage: 8GB, Internal RF Module: TD-ISRM, Operating System: ETHOS.
Go down and check coupons out. Remember to check price history if it is available. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($899.29): BGMatt2022
2. ($899.29): BGMARCHSALE
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGRADIORU, BGToys8, BGSaleFeb8, BGSaleAD
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for FrSky Tandem XE RC Transmitter is here. The lowest price was: $879.74.
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)).