Newegg offers the refurbished Ooma Telo VoIP Phone bundled with the refurbished Ooma Telo Bluetooth Adapter for $84.99 with free shipping. That's tied with our February mention and $49 under the lowest total price we could find for a new set today. It offers unlimited calling to any number in the US via your internet router or wirelessly with the USB adapter. It features caller ID, voicemail, and call-waiting.
Of note, a 90-day warranty applies, although it's not clear who backs it.