As one of its daily deals, Best Buy offers a pair of Polk Audio R150 Bookshelf Speakers for $69.99 with free shipping. That's the lowest total price we could find by $5, although we saw them for $20 less last summer. These speakers feature a frequency response of 60Hz to 24kHz, 8 ohms impedance, 5.25" midrange woofer, and 0.75" tweeter. Deal ends today.