EMAX E8 2.4GHz 8CH RC Transmitter (Banggood, Aliexpress: Model: E8, External interface: Micro USB interface / 3.5mm audio interface (wired trainer interface), Item Name: E8 Radio Transmitter, Maximum output power: 22dbm, Charging system: Built-in USB 5V–1A linear lithium-ion battery charging system, Size: L*W*H=150x140x45mm, Weight: 260g (without battery), Brand Name: EMAX, Working frequency band: 2.4GHz (2400MHz-2483.5MHz), Working voltage: 3.7V-4.2V, Transmitting module: built-in 2.4GHz dual-frequency FPC antenna / 2.4GHz RF transmitting module, Channel: 8 channels / all channels can be configured, (the best price with coupon)).
Get coupons, create price alert or check price history out! Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
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. You can get coupon down below.
Link: Banggood product page
1. ($73.59): BGMatt2022
put item in your cart and apply coupon code there 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): Parts8, BG64989e, BGGAL8, BGRCParts8, Tabby20, BG1efeb0
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for EMAX E8 2.4GHz 8CH RC Transmitter is here. The lowest price was: $71.99.
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)).