I don't know if this is the "unofficial" DMC ebay Store or not, but they always seem to have supply of all the DMC Exclusive titles. This could just be a way for Disney to clear excess stock too?
Anyways, this is an option for people who don't want to join DMC. As noted in this thread though, they are more expensive than if you are a club member:
http://www.ebay.com/usr/welovemovies...p2047675.l2559