Up to 70% off 120+ Star Wars Items. ThinkGeek has the Star Wars Galactic Necklace for $20 + $6 shipping = $26 shipped. 

Has stones to represent Coruscant, Alderaan, Yavin 4, Tatooine, Sullust, Dagobah, Hoth, Endor, and Bespin, plus the Death Star, an X-Wing, a TIE Fighter, and an asteroid belt.