Meade 8x50 Finderscope

Are these any good? I own one and I can't really say. Are stars supposed to be sharp through them? The only things that seem to be sharp are terrestrial.

Also, why are 7x50 finders so expensive?

-Mike

I don't think that the Meade or Celestron 8/9x50 are all that good. They're sharp in the middle but really get soft at the edge. I'm thinking of buying a better finder myself, but haven't settled on one yet. If anyone has a suggestion I would be appreciate it.