I won’t list them all but here are some highlights that may interest you.
The Overlord’s Command Throne and Ambassador’s Meditation Hover Chair are on direct sale right now for 2,240 (30% off from normal price of 3,200). I have both and use both regularly.
All of the Advanced White-Black Crystals are on sale for 1,100 (50% off from normal price of 2,200). One of my favorite crystals. I love all of the white (and the gray) crystals.
Rename: Character Name is on sale for 700 (30% off from normal price of 1,000). These also sell well on the GTN but that may take a dip after the sale. I use these too quickly when I buy them to actually sell any. :D