Best value: only $97.99 at Banggood. 50W Portable Shortwave Power Amplifier with 4-Gear LPF Automatic Transmit and Receive Switching Compatible with Multiple Protocols – Black.
Updated: 28-06-2025
Banggood
Warehouse in China.
Link: 50W Portable Shortwave Power Amplifier with 4-Gear LPF
Price: $97.99
Additional Banggood coupons:
1. First page
2. Second page
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.
Price history and price alert
Check out price history chart (for all/most countries) for 50W Portable Shortwave Power Amplifier with 4-Gear LPF. The lowest price was: $97.99.
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)).