Manufacturer Certified via eBay offers the JBL Flip Bluetooth Wireless Speaker in Blue, model no. FLIPIIBLUAM, for $69.99 with free shipping. That's tied with our January mention and the lowest total price we've seen. (It's also a current price low by $30.) It features a built-in microphone, two 1-5/8" drivers, and up to five hours of playback per battery charge.
Update: Price corrected.