Thing is they need to be developed. Most survived on their potent typeins all these years.
I'd love to see a young kid 30 years younger than me build a tits bdsm tube on say bizarregallery.com or a paysite develope menindrag.com (is that a perfect transvestite site or what, lots of shemale sites but only a few transvestite sites guys.)
Or develope my personal fav, celebrityfootfetish.com into a true kick ass celebrity foot fetish paysite. The market awaits this site. I know of only one other celebrity foot fetish paysite you would be competing with. Actually I have enough content on my HD to prob start one myself
but alas I'm a one man band and I have enough to do.
cutetoes.com is certified premium by Great Domains and is prob my 2nd best domain. I have cutetoes bottomed out at $1000. I was advised it is worth 4 figs.
freephotogallery.com was just appraised by Sedo at $2500 and, humbly, is my best. And we know Sedo doesn't give high appraisals easily. I have it up for $1500.
My highest type in domain is picturesofsex.com with upwards of 500 a month. This was my core domain for many early years. If it sells I have to update some progs.
Most of these domains have been many different designs over the years and all get type ins.