I think this is the most relevant advice here. I've been buying/selling domains for about a decade now. Leaving it up for sale on sedo and also listing the domain for sale on the site itself are two ways people generally sell names. There are a lot of other marketplaces (GoDaddy, Afternic being the biggest after Sedo) to list on as well. Most aren't worth a damn (other than those 3 I have heard almost no success stories).

If you think there is real end demand or really want to liquidate you can consider some of the newsletters that go out daily to thousands of buyers(toby clements, eric rice). Or post them on domain forums (dnforum, namepros) or webmaster forums that have a domain section (digitalpoint, webhostingtalk).