I've been thinking about signing up for wetandmessy.com because their members-only videos look promising but a subscription costs $24.95 for thirty days?
If you've never joined before, there are a lot of great videos and photosets (Kym initiating Emily Addison is an all time favorite for me). However, the site is no longer consistently updated, so it is not worth an ongoing subscription. For a one time fee however, $25 is a solid price for the 100+ vids on the site (at least last time I was a member a couple years ago, AFAIK no vids have been removed from the site).
Virtually any members site with a healthy back catalog that interests you will be worth the price, not much difference between $20 and $25 when you're talking about 50+ videos.