Ending today, Groupon offers the factory-refurbished ION Block Rocker Portable Bluetooth Speaker with Microphone for iPhone, iPad, and Android, model no. IPA56C, for $99.99. Coupon code "SALE3" drops it to $84.99. With free shipping, that's $15 under our August mention, the best deal now for a refurb by $35, and the lowest total price we've seen. It features a retractable antenna, Bluetooth range up to 75 feet, auxiliary input, built-in dock for iPhone or iPad, retractable handle, wheels, and up to 75 hours of use per charge. A 90-day ION Audio warranty applies.