Well when LFL does they need to bring some oddball stuff, not just the popular stuff. I'm talking that rifle that little Yuzzem guy has in ROTJ, the gun Dengar has in Jabba's palace, etc.! I saw the exhibit that was going around right after ROTS came out here, and while it was really cool, it was all the most popular things.
To be fair there are two travelling exhibits with loads of archive props/models out there right now. One in Montreal and the other in Kansas I believe.