Yeah, that's $43 CDN. I just started researching these cases. Only because I have some drives lying around. Turns out it's a thing.
There are also Dual mSATA RAID and M.2 NGFF SATA RAID enclosures.
I've been looking to make some back-up drives from old laptop 2.5 HDDs (as they are being swapped out for SDD). Wondering if I should get a case like GLOTRENDS 25R USB 3.0 2 Bay RAID Enclosure or just get two cheap enclosures and run Unraid?