Pins. One of the smallest collectibles on the market, but unique and a badge of honor to collectors. Star Wars and pin trading goes all the way back to the 70's, some of the first Star Wars collectibles were pins. My personal favorite is the old "Darth Vadar Lives" mess-up pin:
This year at Celebration, taking a que from Marvel and the pins they do for their booth at cons based on Skottie Young art, there will be a plethora of pins available not only in the show store, but at exhibitor booths and for trade by finding show staff as well. Here, the full list:
First: these are adorable and instantly upon seeing them, I want them all. But from the stories I have heard, pin trading at Celebrations is a nightmare. The blind bag pins and staff only Death Trooper pin will be the hardest to get and the most in demand, but I am actually more worried about the booth pins. I am pretty sure each booth can decide how to distribute theirs, so that may require a certain level of purchase. I do know for sure that you can get the Thrawn one from Del Rey with purchase of their special edition of the new Thrawn novel by Timothy Zahn, which I was already planning on buying. And who knows how hard the 2-packs that are sold out already will be to get, those will be overvalued as well. A quick spin on eBay shows that there is not only a market for these, but that they don't seem to get any cheaper after the fact. Hopefully the reports from last Celebration of people sweeping whole armfuls of pins into their shopping bags does not happen this time, or else you may be out of luck.
Make sure if you want these to bring plenty of trade bait with you.