$33.83 – RIDEN® RK6006/RK6006-BT 60V 6A 4 Digit Communication 360W Adjustable Digital DC to DC Step Down Voltage Bench Power Supply Buck Converter – RK6006.
Latest update shows that RIDEN RK6006 60V 6A Adjustable Bench Power Supply costs $33.83 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($33.83)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Is it a reasonable price for this item? Hmmm, price is higher than average (which is $32.45 right now), so better set price alert down below…
Link: Banggood product page
Price: $33.83
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG589b2e, BGd44d41, BGca56a3, BG8e1347, BG8FORMULAMX
(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
Price history (for all/most countries) for RIDEN RK6006 60V 6A Adjustable Bench Power Supply is here. The lowest price was: $29.99.
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)).