seem unavaible, so no priceinfo and if its "sketchy" in regards to what they are asking..
but at sub 50USD delivered (guessing=) ur likely getting what your paying.
I went for some of the linear KOrad variants that were around 60 to 70USD, but some of that is likely shipping costs, as they do weigh quite a lot...
I purchased these two (P with USB PC control interface) and were around 70USD delivered each, though it is numerous years back, so likely way better purchases today...
video of the inside of the more crude variant/weight..
https://imgur.com/gallery/B7ZOQ3JThe biggest con is the 5A limit, though I can daisy-chain and reach higher ampere , when IM dealing with laser diodes that needs above 5.1A and also quite a con the lack of dedicated on/off button on one of the units.