Looks like you got the drive for a great price. The interface looks kind of cool also. I hope you get it to work OK. I've got a SCSI 100 ZipPlus that works fine off my SCSI adapter but my ZIP 250 was always problematic. I saw the drive and formatted it just fine but could never access it properly.
You might find a friend with at standard Zip 100 parallel and give that a try. I think the 250 model you have might have been a bit buggy.