$16.99 – XY-UDP Digital USB DC Converter (Banggood, Aliexpress: XY-UDP Digital USB DC Converter CC CV 0.6-30V 5V 9V 12V 24V 2A 15W Power Module Desktop Adjustable Regulated Power Supply (the best price with coupon)).
When I was updating this page the price was $16.99 for XY-UDP Digital USB DC Converter (in Banggood). You can create price alert here, copy coupons and view price history. What is best price?
Latest coupon and price update (UTC):
Banggood ($16.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Isn’t it too expensive? Hmmm, price is higher than average (which is $11.99 right now), so better set price alert down below…
Link: Banggood product page
Price: $16.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BG3aa3e2
(these codes were not working in latest coupon update, but you can check them out anyway)
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 XY-UDP Digital USB DC Converter. The lowest price was: $9.99.
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)).