My local comic shop got in a whole ****load of common vintage figures back in August. I cleaned house on Stormtroopers, Bespin Guards, Rebels, and some other commons that needed replacing.
Most were $2-3 a piece, with decent paint jobs and weapons. The Stormtroopers were a little more expensive, at about $7-9 a piece. But most had their rifles, and really weren't too dirty.