Is there a comic con or swap meet you could perhaps get a space/table at? I sold the bulk of my collection to a local comic book shop owner, but that was back in the 90's.
There are several sites devoted to Star Wars toys like Rebelscum, that may have good selling info in their forums, or people looking to buy out a collection.
It might be prudent to wait until Episode 7 comes out, and the mania for everything Star Wars returns.