Nate, I've seen them as low as $350 for the Universals and as high as $1000 for the collectables. I've heard bad things about the Universals breaking, but you should still be able to get a non-Universal shooter for $500-$600 at some of the gun shows. Forget about getting makers like IBM or Rockola for that price though.
I got my 1943 Quality Hardware for $300 oFf an old guy who just wanted to "get rid of some old guns he had laying around". I later bought his matching part Springfield Garand for $300, too.
I almost felt bad for taking them, but then I came to my senses!
SC