Newegg is having a 48-hour sale (which they conveniently left out the start or end date for) on this originally $399.99 sub, taking the price to $149.99...

Newegg has a great deal on the 12″ Polk Audio PSW505 powered subwoofer ($599.95 list) with a $360 instant discount plus an additional $50 stackable...

Office Depot has this Samsung home theater system including 3D Blu-ray player, 5 satellite speakers, 1 subwoofer, and 500w RMS amplification for $134.95...