Yep. I have a bunch of them. Sold some off, here are some examples...
http://www.gfy.com/sell-and-buy-forum/901139-selling-clip-stores-web-sites.html
...also see sig.
I have already started three new one's for my new production company. I dump new material on clips4sale and build up momentum for a few weeks/months before launching pay sites. That way I have a number of months material. It has worked like a charm for past 5 years.
Right now have 6-7 on C4S. With a few scattered on FetishVideos, Clips, YouYouGirls, etc..