Good Place for Classical CDs

I have been buying records from Berkshire Record Outlet for a long time. They have mostly classical but some others. Not the place for the latest Beethoven 5th but if you want Medieval music or a Schubert Octet look here. I got my BBC recording of the theme music from Dr Who here years ago. Where do you buy good recordings ?
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I found Amazon and the Gon a good starting points.
I second It's a great resource.

CD Universe does it for me most of the time. CD Connection not bad either.