Manta.com is a website where you can look for companies in a particular niche, as in Product wise, Service wise or business wise. The search works best if you look for companies based in US. This is a great place to find people who may be interested in buying your domain names not at a very high price, but still, you can flip domains to people listed here for lets say, $250-$500 or even more(depends on the way you negotiate). I have made good use of this resource in the past and have made some decent sales out of it. Try and share the results so that our community at Inforum may benefit from it.