Buy.com has the Targus ACP45US Universal Notebook Docking Station w/Digital Audio for $20 with free shipping.
Tech Specs:
- Includes: Universal Notebook Docking Station with Digital Audio
- 6-foot (1.8 m) USB cable
- Driver CD
- User's Guide
- AC Adapter
- System Requirements AC Adapter required for Targus Docking Station (will not function as a BUS powered device)
- Windows 2000 with SP4, XP SP1 or greater, or Windows Vista and a USB port
- Technical Connector Types:
- (1) 10/100 Base-T Ethernet (RJ-45) Jack
- (1) Serial Port
- (2) PS/2 Ports
- (1) S/PDIF (digital audio) output
- (1) Audio output
- (1) Mono Audio-In Jack (3.5mm for microphone)
- (1) Parallel port
- (4) Hi-Speed USB 2.0 Ports (two Power Ports and two standard USB ports both are backward compatible with USB 1.1 devices and support transfers up to 480Mbps)
Link
Targus ACP45US Universal Notebook Docking Station w/Digital Audio $20 + FS 
