I've seen plenty over the past few years, just for stupid money. Leia on the other hand has been extremely rare with a proper hairdo.
I always see them on eBay and other sites, but my rule of thumb with vintage is that I have to either come across it in a store or market. Makes the hunt for more fun for me in a world where everything is online. I got a super white R2 and Stormtrooper last christmas, I was really pumped. The old kenner 12" figures have a lot of charm for me. Leia is definitely a hard one, for now I am sticking to kenner robots and masked characters. One day I may for for the humans, but we shall see haha.