This deal has ended.
Overstock has a refurbished Nokia HS-26W Universal Wireless Bluetooth Headset for $17.66 after their 7% off coupon (there is also an 8% off coupon for new customers), a $5 drop from a previous mention. Shipping is $2.95 and there is no sales tax. The small headset has an elastic ear hook that can fit on either ear. This is the best price I've seen on any Nokia bluetooth headset.