Amazon offers a pair of M-Audio AV42 20-watt Studio Monitor Speakers for $98.83 with free shipping. That's the lowest total price we could find by $50. Each speaker features a frequency response range of 75 Hz to 20 kHz, 4" woofer, 1" Ferro fluid-cooled silk cone tweeters, and black vinyl laminate finish.

Update: The price has dropped to $97.30.