Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Brand Item: FlySky, Wireless frequency: 2.4GHz ISM, Item Name: FS-ST8 Radio Transmitter with FS-SR8 Receiver, Model: fixed-wing / deltas-wing / glider / helicopter / multi-axis / FPV / car model / engineering vehicle / robot / boat, Model: FS-ST8, Wireless protocol: ANT, Channels: 8-10, Transmission power: <20 dBm, Version: Standard Version/Upgraded Version
Aliexpress
There’re some similar (or not) items on Aliexpress
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. Only one coupon available!
Link: Banggood product page
1. ($84.63): BGAUGUST8
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGRADIORU, BGToys8, BGSaleFeb8, BGSaleAD, BGMatt2022, BGMARCHSALE, BGToySale, BG589b2e
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – FlySky FS-ST8 2.4GHz 8CH ANT RC Transmitter with FS-SR8 Standard [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for FlySky FS-ST8 2.4GHz 8CH ANT RC Transmitter with FS-SR8 is here.
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)).