Harman Audio offers the refurbished JBL Go Portable Mini Bluetooth Speaker in several colors (Black pictured) for $19.99 with free shipping. That's tied with our June mention (which was a new model) and is the lowest price we could find by $5. It features Bluetooth 4.1, a rechargeable battery, 3.5mm auxiliary input, USB charging, and speakerphone. Deal ends August 13.

Note: A 1-year Harman Audio warranty applies.