A couple of notes on CD Movies at
http://www.adultcdmovies.comTheir prices are usually pretty good but sometimes CD Universe is better. However there are tricks:
CD Movies seems to usually charge $2 extra to preorder a title (that's $2 per title). It's best to wait until something actually reaches release date to order as it may become cheaper.
Once a title reaches release date the CD Movies price usually stays the same for a long time; the release date price is usually the "final" price. But I just noticed today that PXP titles with a release date of 5/20/4 or before are $15.99, more recent releases are $17.999, and not-yet-released titles are $19.99.
A good strategy is to check the CD Movies price by going to the title's page, clicking on the studio, then clicking to sort by "Release Date", and seeing what the "final" prices for releases from that studio seem to be. Then check CD Universe and compare.
CD Universe often doesn't show a title until a few days after street date, so sometimes on a new release you have to look up some slightly older title to see what CD Universe usually charges for that studio's titles.