$99.99 – 50W Portable Shortwave Power Amplifier with 4-Gear LPF Automatic Transmit and Receive Switching Compatible with Multiple Protocols – Black.
I am monitoring price for 50W Portable Shortwave Power Amplifier with 4-Gear LPF and it is for $99.99 now (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest price update (UTC time):
Banggood ($99.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Is it a reasonable price for this item? Well, according to CouponsFromChina database this price is the best in history (4 records).
Link: Banggood product page
Price: $99.99
Additional Banggood coupons: first page and second page
This is the best price ever noted in my database!
Old coupons (from the oldest to the newest): BG5c814d, BGALL8, BGMAI666
(I don’t think these’re gonna work, but you can try ’em out anyway)
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
Do you need price history chart (for all/most countries) for 50W Portable Shortwave Power Amplifier with 4-Gear LPF? There we go. The lowest price was: $99.99.
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)).