AcousticSoundDesign Factory via Amazon offers this pair of Polk Audio TSx110B 2-Way Bookshelf Speakers in Black (pictured) or Cherry for $137.95 with free shipping. (Crutchfield and World Wide Stereo charge the same price.) That's at least $91 off list and the lowest total price we could find. Features include a 53Hz to 25kHz frequency response, 5-1/4" woofer cone, and silk/polymer dome tweeter.

Also available is this pair of Polk Audio TSx220B 2-Way Bookshelf Speakers in Black or Cherry for $179.95 with free shipping. (Crutchfield and World Wide Stereo charge the same.) That's the lowest total price we could find by $120. It features a 45Hz to 25kHz frequency response, 6.5" mid-woofer cone, and silk/polymer dome tweeter.