Latest update shows that SKYRC BD380 DC 30.0V Discharger 380W RC Battery Discharger costs $128.99 (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
SKYRC BD380 DC 30.0V Discharger 380W Battery Discharger for RC Toys
Latest coupon and price update (UTC):
Banggood ($128.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. You probably want to know if this is a good price. Looks like a good price to me (average is $134.32).
Link: Banggood product page
Price: $128.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGESJY8, BG7blue06
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for SKYRC BD380 DC 30.0V Discharger 380W RC Battery Discharger.
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)).