Source for low cost redbook CDs


I'm looking for any recommendations for good sources of CDs with a large inventory of music and reasonable or low purchase/shipping costs. Currently a member of www.yourmusic.com which offers a shipped CD for only $6, which seems to be the best I've found to date. Only problem is that they've got a somewhat limited inventory. I enjoy a wide variety of music - classical, alternative, christian, old and new rock etc. Any suggestions?
advent11
In addition to the site you already use, the three sources for discounted CDs I use are:
1. http://www.amazon.com for used CDs or orders over $25 on new Cds have free ship.
2. http://www.deepdiscountcd.com offers reasonably low prices on a wide variety of titles with free shipping.
3. Of course http://www.ebay.com can have decent prices on new/used CDs. Their sister site http://www.half.com is also worth checking out.
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EBAY..I've just purchased 2 new cd's..somewhat obscure jazz for a combined 9.00..
I currently have 14 CDs on Ebay Auction myself. I also have few titles advertise here on Audigon - great used price. I normally go to www.cduniverse.com for sample clips.