Used high quality classical CDs ????

Does anyone out there have any favorite websites or other places you know to find good high quality classical CDs?
(i.e. Telarc, Teldec, Hyperion, etc.....) It's easy to find popular music used, but these types of labels are more difficult to find. Any ideas??????
Sometimes on amazon, sometimes on ebay, it pays to be patient and why don't you post a wanted ad here ?
Actually eBay for most things. The link is:

Tower Records lists many used, store demos and cut-outs at:

Amazon sometimes lists used sold by affiliated dealers.

This response does not exactly match your question.I buy a lot of classical cds,.I have found terrific buys on new high quality cds at BMG for incredible prices when they have sales.You can find them on the net.