Best Buy again offers this pair of Polk Audio 5-1/4" Bookshelf Speakers in Black, model no. T15, for $49.99 with free shipping. That's tied with our mention from June as the best price we've seen. (It's also a current low by $35.) These speakers feature 5-1/4" polymer composite rubber surround woofers, 3/4" silk/polymer composite tweeters, and a frequency response of 60Hz to 24kHz.