[kibibyte]

It's cheap because it doesn't come with a case or a PSU, and appears to only be available through AliExpress (not necessarily a bad thing, but could make manufacturer support tricky).

A case might be nice if you prefer not to have a bare GPU on your desktop and if you want to slow down the dust buildup. SFX power supply units appear to run you about $100 for something like 650W. The power delivery is limited to 60W (in terms of how much power it'll deliver to charge a laptop), which is sufficient for many laptops but probably not all of them (I think the last generation of Intel MacBook Pros might want more than 60W).