I know all the focus is on the Cartel Market at the moment.
But you do also owe your CE purchasers what you advertised; regular updates to the exclusive vendor.
Now, since you obviously (and understandably) don't want to go putting in a lot of work for relatively few people, how about giving us already existing stuff on there?
What I'm talking about is the event gear. The stuff that eventually stops being available.
The Containment Team armour and Rakling pet from the Rakghoul plague? The Sand-People armour from the Acquisition Race? The white crystals that were on the short-lived vendor?
Give it about 6 months-1 year from them being made unavailable, then slap 'em up on there for a high cred price (you can also put an optional cartel coin price on 'em if you like, we won't complain about being given options).
Pre-Emptive Response
Objection: But they said these things wouldn't be available any other way, it's unfair to the people who went to the effort at the time!
Answer: They also said the CE Vendor would get regular updates. Not doing so is unfair to the people who spent well over-and-above the base price for the game, not to mention being false advertising. If they're going to break a promise to their players, I'd rather they broke it in favour of rewarding players, not short-changing them.
Extra-Credit: Also, you could throw some re-colours of existing gear up there. Again, give it the credit or coins payment option. I'd personally love to get hold of a dark blue & gold version of the Dire Eliminator's Chestguard.