IOGEAR GBHFK231 Solar Bluetooth Hands-Free Car Kit for $29.99 shipped, by joining Mclub.  MClub is basically a subscription to Mwave's emailing list.  Here is a screenshot for reference.  It has approximately 11 to 13 hours of talk time, features Bluetooth, and includes mounting brackets, a micro-USB cable and car charging adapter.  Most places have it for about $39.