Half-Priced is what you make of it. I'm guaranteed to find something, if I look hard enough. It's not difficult to find popular titles or of a series if one is into mystery or Sci-Fi. I've seen some good CD's (like that Cowboy Bebop soundtrack) that I should've bought when I had the chance.
The staff is halfway helpful, though. They will drag their heels about wanting to look at any used things to take in. Their help desk is halfway helpful.