BigDeals via eBay offers the bulk-packaged Motorola HX600 Boom Bluetooth Headset, model no. 89605N, for $22.99 with free shipping. That's $3 under our mention from a month ago and the lowest total price we've seen. (It's a current low by $17.) It features up to six hours of talk time, NFC pairing, and a range of up to 300 feet.
Of note, this item is new but does not ship in its retail packaging.