The biggest problem with domain investing or domaining is the fact that the supply of aftermarket domains is much greater than demand.  Its pretty much that simple. Now, if you have a highly ranked site attached, with some traffic, now you open up the buyer pool by 100 times or more.  Do not sit on your investment unless you can afford to have your investment tied up for 2 or 3 years.  Does that sound harsh?  If this makes sense and you would like another option, I've got some great domain news for you.  My company DotVentures, LLC is now taking applications for domain owners that are interested in partnering.  We have a network of content writers and the technology to take those domains to the top of the search engines.  We have two options; you can' either use our tool and our premium content services, spend about $99 a month; or, if I believe in your domains as well, we'll turn it into a directory or a blog and build the value that way.  If interested please email dale@dotventures.com