My kingdom for Dark Legionnaire pieces!
I have: a Vrake mount, multiple Jedi temple decos, the Morlinger mount, multiple Rugged Infantry pieces, multiple Tund Sorceror pieces, multiple copies of /yippee, and /battleplan, among other odds and ends I can dig out of my bays.
EDIT: Also! Weapons! Sabers and rifles and snipers!
EDIT 2: Also the Vanity chamber! I have the belt and boots lined up, priority is now the chest piece though other pieces are definitely needed.