Those Schwinns are nice but I'd be curious if they're getting any buyers at that price. The quill seatpost on that one looks messed up and those are very hard to come by. I'm selling a 594 that I fixed with a special dual seatpost clamp. I listed it for $250 and there hasn't been any interest yet.
Also, they used Klein's patent but I don't think they were actually made by Klein. Someone with more experience might correct me on that.