Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Input: 100 – 240V / 50 – 60Hz / 0.2A
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):
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $0.99.
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)).