Do you have the original cases?
I know that there's a store here called Wherehouse Music, that buys used CDs and DVDs. They've got 2 options, cash back, or credit. If you take the credit option, you get more for your stuff. A couple of years back I took about 150 CDs in and got credit and got some new music and movies. I think you could even check prices on their website.
I suspect there are other places like that.
A little searching online and presto!
http://www.wherehouse.com/sell.jsp
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa
SOLD 2004 - gone but not forgotten