Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Input Voltage: 2-3S Lipo (DC 7.4-12.6V), Spektrum DSM2/DSMX, Three sets of BEC output pads, Board Weight: 3.3g, Black Box: 8MB, Board Size: 28.5×28.5mm, Support BLheli suite ESC programming, BEC: 5V 2.5A, IBUS, RX1 (for receiver), CPU: STM32F411CEU6, F4 OSD Flight Controller, M3, Built-in OSD interface, Sensor: MPU-6000 3-axis accelerometer/3-axis gyroscope (SPI connection), SBUS, Built-in voltage detection, UART2: TX2 (for image transmission), UART1: TX1, RX2, Screw hole spacing: 24.5×24.5mm, 1024/2048 Receiver, Led_Strip interface, BUZZER buzzer interface, Support PPM
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. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, BGRACING1125, BGGAL8, BGJON8, BGRCParts8, BG8FORMULAMX
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for JHEMCU SH50A F4 OSD 2-3S Flight Controller 5A.
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)).