Here's the thing. I have a domain name, but I know longer have the site, because my host went belly up. I would just get another host for the domain, but I moving in another direction. So what do I do? The name of the domain is www.thenetexpo.com I don't know if it is possible, but I would sell it based on what is left on the contract. Is that even possible, I have no idea.
You could park it at sedo for example and at the same time put it up for sale there, if its been an established site in the past it could help with it receiving some traffic while parked, earning you some cash while parked if you get clicks.
parking is an option, but you could always get a free hosting from somewhere, change nameservers from your domain control panel and publish a new website.