I'm selling my Sena SMH5 dual pack (2 units) with the upgraded speakers. It's updated to the latest firmware (v.2.0.1) and includes the following...
2 SMH5 Headset Main Units
2 Clamp Units
2 Glued Surface Mounting Plates
2 Standard Speakers
2 Upgraded Large Speakers
2 Boom Microphones
2 USB Power Cables
2 Allen Wrenches
Various Velcro Mounting Pads for Speakers & Mics
Further details and reviews can be found here. The only difference between that unit and mine is that they changed the wire connector to be locking (whereas mine does not) and mine will come with the upgraded speakers found here (again, the non-locking connector though). Looking to get $140 shipped.
Actually I believe the 20S is their newest headset. The one I'm selling (SMH5) was purchased in July of 2012, but is still being made/sold today with the only difference being the locking-type connector* that they added somewhere along the line. Electronically it is the same, updated via firmware updates, all of which are current on these units.
*You can add the locking connector if you want it with this replacement piece.