That's probably not what you want; that's a so-called "Zero-Channel RAID" card, which can take an existing non-RAID SCSI controller in the same system (if it supports this kind of thing, via proprietary extensions) and give it RAID capabilities. You cannot just install that card in a system without a SCSI controller already being in there.
I very much doubt you'll find anything *new* in that price range. You may be able to find older SCSI RAID5 hardware (maybe at U160 speeds, although it shouldn't matter much for a smaller array) for under $200.
Edit: Crap, that was another ZCR card. I knew it was too cheap.
THIS is really the cheapest SCSI RAID5 controller that Newegg carries.