If u dont mind importing, try this site, it's the best:
http://www.secondspin.com/they are reliable and their prices affordable, been using it for years now...
but u gon stil hav to pay customs wen they arrive this side
most of their cds are demos/secondhands but well in gud shape and its cheaper if they ship them without jewel cases, meaning only the disc and the covers/inlays
sometimes the shippin is free...takes about 3 weeks or less at times to arrive this side, provided our post office is not on strike ofcos....
u must hav a credit card though....