Harman Audio offers its factory-refurbished Infinity Primus PC351 Center Speaker for $99.99 with free 2-day shipping. That's $50 under our December mention of a new one, $100 off list, and the lowest total price we could find. It can handle up to 150 watts and features an 80Hz to 20kHz frequency response, 0.75" dome tweeter, dual 3" midranges, and dual 5.25" woofers. A 1-year Harman warranty applies. Deal ends June 15.