The one that went for $643 had a Cybervision 64 and a scsi connector on the expansion port that could mean an accelerator with SCSI. The terminator is 50 pin SCSI II so probably not a Cyberstorm MKIII or PPC. Or, it could be a Dataflyer internal SCSI board. For that much money, a real gamble. The one with the corrosion was stock. Looks like it was exposed to moisture in storage so it probably doesn't smell too good and needs a lot of serious cleaning.