Excellent condition Motorola Surfboard SB5100 Cable Modem - $20 (San Francisco)

Hello.
I'm selling my Motorola Surfboard SB5100 Cable Modem.
In excellent condition.
DOCSIS 1.
1 and 2.
0 Certified.
Integrated A-TDMA and S-CDMA technology--capable of providing up to 30 Mbps upstream data rate.
USB and Ethernet connectivity.
Front panel status LEDs and built-in HTML-based diagnostics for quick and easy troubleshooting.
Compatible with Windows 95, 98, 2000, Me, NT, XP, Mac OS, Linux, and UNIX.
Asking for $20.
Cash only