HaiTeng B2C via Amazon offers the Meidong Hi-Fi Portable Wireless Bluetooth Stereo Speaker for $34.99. Coupon code "IY7G9DV2" drops it to $24.99. Plus, Prime members bag free shipping. That's tied with our March mention, $65 off list, and the lowest total price we could find. It features Bluetooth 4.0 and up to seven hours of playback.