Well if parking and min-sites are dead, and you need to sell your names, then you are just going to push down the prices. I have never felt that conventional parking pages were any good, but I dumped names on them to avoid losing them through disuse.
I don't agree that mini-sites are dead. You only have to look through the softaculous installer to see the massive range of sites that can be generated. At the moment I'm experimenting with blogs, forums, picture galleries, url shorteners, top lists ( now there is an old concept), ad servers, and few others including an e-shop. Of course it involves a bit of work. I haven't started to fly advertising yet, as I am still experimenting, and hunting for traffic, but I'm still optimistic about running a small portfolio of reasonable names.