Are you looking at the Minneapolis craigslist? I've found quite a bit of nice saddles there lately. I shouldn't be shopping but I can't help myself, we have more saddle racks that need to be filled hehe.
There are a few sale barns around here too that english saddles sell for $10-25 no joke. Western people have no idea what they are selling. And since you can look them over beforehand you know the brand and everything.