You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
XJB F428 – TX20 – ELF consists of F4 FC, 4-in-1 BLHeli – S ESC, 5.8G 72CH VTX, MPU6000 connected via SPI, ESC supports 4x 28A continuous current and the latest digital signals, FPV camera has the excellent 1/3 inch Super HAD II CCD sensor, and supports 5 – 36V input voltage, Suitable for building 65 – 250mm FPV racing drones
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
HGLRC XJB F313 DSHOT F3 Flight Control 4 in 1 BS13A ESC for RC Micro Drones | $64.54 | – |
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. ($96.06): 7bcdf9
2. ($96.66): Parts8
paste coupon code in your cart and click Apply 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): 502C6B, f62884, BGss11, BGPAYPALSS, BGBCFPV, BGBCBG10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for HGLRC XJB F428-TX20-ELF F4 RC Flight Control System? There we go.
Price records source(s): Gearbest, 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)).