For auction, the most boss armor there is.

http://img710.imageshack.us/i/maxelementalsunsetduste.jpg/
4-star right now, giving the most flexibility for a future upgrade, but can be taken to 5 star if a buyer is interested.

For reference, this is what the stats were at 3 star, showing the UV scaling effect for maximum defense for elemental. If you take this armor to 5 star (perhaps via deadshot or nameless poncho) you'll have either a normal/shadow/elemental or a normal/crazy high elemental armor.
http://img217.imageshack.us/i/maximumgunslingersash.jpg/

Starting bid: 10k CE
Minimum increase: 250 CE
Ends 3 days from this post.