Amazon has the Altec Lansing FX3022 Expressionist BASS 2-Way Speaker for PC and MP3 in Black for $55 plus $5.79 shipping.
Technical Details:
* Computer speaker system with subwoofer built into speakers
* Built-in amplification provides 25 Watts
* Custom built 40mm drivers provide clear and realstic sound
* Auxiliary input lets you connect MP3, CD, and DVD players
* Measures 5.25 x 10 x 5.25 inches (WxHxD); backed by one-year warranty
Amazon.com: Altec Lansing FX3022 Expressionist BASS 2-Way Speaker for PC and MP3 (Black): Electronics
Altec Lansing FX3022 Expressionist BASS 2-Way Speaker for PC & MP3 -Black $55 + $6 SH 
