$24.99 – WZ5020L DC-DC 50V 20A 1000W Buck Converter CC CV Step-down Power Module Adjustable Voltage Regulated Power Supply.
According to my DB the lowest price is $24.99 for WZ5020L DC-DC 50V 20A 1000W Buck Converter (in Banggood). Check coupons or create price alert down below. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($24.99)
Banggood warehouse is located in China. Coupons for WZ5020L DC-DC 50V 20A 1000W Buck Converter? Nope, there’re no coupons in Banggood. Is it a low price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $19.99)
Link: Banggood product page
Price: $24.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG142c6e, BG589b2e
(you can check these old coupons out, but these probably won’t work)
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
Price history (for all/most countries) for WZ5020L DC-DC 50V 20A 1000W Buck Converter is here. The lowest price was: $19.99.
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)).