For sale is a ATTO ExpressPCI PSC Single-Channel Ultra/WIDE SCSI Host Adapter.  A WORKING PULL.  SOLD AS-IS.  Here are the specs:

Delivers Ultra/WIDE SCSI Performance
Single channel for throughput up to 40 MB/sec.
Supports up to 15 devices
Supports legacy (SCSI-3, SCSI-2 and SCSI-1) SCSI devices
Single-ended devices (PSC)
High Voltage Differential (PSCd) for longer cable lengths - up to 25 feet
Internal HD-68 and External connectors
 
Features Advanced Data Streaming (ADS) Technology for controlled acceleration of data transfers
Embedded RISC processor for low-overhead operation
Bus Mastering capabilities eliminates CPU processing time as a bottleneck
Tagged Command Queuing allows multiple commands to be processed in any order
Disconnect/Reconnect eliminates wait time between transfers
Supports standard PCI Specifications
PCI 2.1 compliant
 

Robust Driver Support
Windows Server 2003, XP/2000/NT, 95/98
Mac OS X
Mac OS 9
Linux