It really depends on your needs. But if it is old and has like say 6 drives of 60 gigs each for 360 gigs...
Well you can buy a new 1 TB drive for $110ish now (there's a sale at dell this very moment for a seagate 1 TB SATA drive for $109).
So if its space you are interested in, most likely its not worth it.
In fact, if you get the PC SCSI card that someone was talking about, just the cable to connect the card to the server (looks like a version of external SCSI from first glance) , could be $50-$100+ !
Its probably old enough and heavy enough that there's not much call for it on ebay, although you could search ebay and see if there's any similar items going and what bids they are fetching.
And as others have mentioned, the power requirements are going to be steep. A significant cost to run it.
However, if your data fits within the size of the hdds there and you want to run a raid version that protects your data, then you might find a use for it. If it is HDDs in there, it looks like they are also hot swappable, which is something thats also important for 24/7 uptime of data.
Just keep in mind that RAID only protects from certain types of hardware failure. If windows craps up and decides to delete a partition table, then you are stuck even with raid. As a result, if data security or uptime is paramount to you (the only reasons I could see using this) you'll want to have backups in place as well, like external drives backing up the array, and then maybe even offsite copies, etc etc.
My suggestion: first find out exactly what you have (brand, model of the case), and look into those cages to see the kind/size of the hdds.
Then you probably can figure out what you'd need to hook it up to a computer and how much it would cost.