Are you into BDSM and kinky bondage and fetish movies? Wasteland is well worth a look! This site states it has the largest collection of BDSM videos and pictures with plenty of variety. Tied and bound women, slaves serving their mistresses, it's all here in one easy place.
Although this is a paysite, this niche of content is relatively hard to come by, and you can subscribe for $34.95 per month. This is a little more expensive than your normal paysite but let's face it, it can't be cheap to shoot this style of porn!
There is also a 2 day trial for $4.95, however I'm not sure if this is limited or not. If you're worried about parting with your cash, this could be a way to get a taste of whats inside.