If you are a webmaster you surely know the website Sitepoint which, among other things, has a nice marketplace where webmasters can sell and buy websites, services, templates and everything else that is webmaster related. Sitepoint has probably the nicest layout of all webmaster forums that offer a marketplace. It still is only a forum and you have to click on a sale thread to view the details. With dozens of new threads each day this can be a very repetitive task.