Cheap CDs from Internet site

I recently joined SwapaCD which requires members to post CDs you are willing to trade with others. It's a great way to get used CDs, cheaper than a brick and mortar store, and with a larger selection. A member gains one credit for initially posting CDs and then gains additional credits as others request your surplus CDs and then report receiving them in the mail. The site also requires members to deposit at least $5; each time a CD is requested, about 50 cents is deducted. I looked through the classical section for modern stuff and found music by composers such as John Adams, Crumb, Corigliano, Glass, Reich, Rorem, Tavener, Torke and others.