I have a little over 100 domain names. I would only sell one, I don't like it. A few I might let go of, I only register for a year at a time. I enjoy setting up websites to see what happens and to learn new coding. It is nice to go though and see what best matches what I want. The names are already there and I have the names hosted, all I have to do is put up an index.html or simular page to get started with what I'm doing. This saves time. I'm more interesed in names I enjoy that what can be resold because I would have no idea how to resell other than have the name redirected to a "page for sale" site. BTW, until I use a name I have it redireded to one of my better visited sites. No one have complained yet.