Boom Box via Amazon offers the Meidong iChocolate Mini Portable Wireless Bluetooth Speaker for $39.99. Coupon code "Y9AF5M2E" cuts it to $22.99. With free shipping, that's the lowest price we could find by $7. It features Bluetooth 4.0, frequency response of 80Hz to 20kHz, and up to 8 hours of play time per charge.