You won't be able to get your A2 fixed for free. Canon has consistently denied that there was a design problem. But you can get it fixed, better than new, by Horizon Electronics. They replace the broken, plastic part, with their own, metal part. It will never break again. I think they charge about $100 for the repair and you'll get it back cleaned, too. They do the same repair under Canon warranty, too. But I'm sure your warranty is long past.

Not exactly sure how much EOS 3s are going for. My guess is used ones are selling for about $500-750. And the EOS 3 is still a very, very good camera. To find out how much they are new, just go to the EOS 3 review page and click on the B&H or Adorama dealer links.