Affinity SBX400 Bluetooth Bookshelf Speaker for $40.00. Shipping is $5.00 for a total of $45.00 shipped. Here is a screenshot for your reference. It features up to 30 watts peak power, two 2-1/2″, full-range speakers, Bluetooth connectivity, 60Hz to 20kHz frequency response, and 84dB sensitivity. Most places have it for about $59 or more.