SunBeltProducts via eBay offers the Retro Bluetooth Phone Handset in four colors for $11.99 with free shipping. That's $5 under our mention from last month and $5 under the lowest total price we could find for a similar one elsewhere. It is compatible with most mobile devices and features 10 hours of talk time, a 10-meter range, volume control, and more. Deal ends January 26 at 5 pm ET.