ThisWebsiteMayBeForSale.com - This domain name has substantial value by being the best name ending, which of course is dot-com. There are more than 60,000 results in Google on a "this website may be for sale" search.
Some popular related Google searches are on: sell website for free, how to sell a website to a client, best place to sell website, buy and sell websites, how to sell a website domain, sell my website fast, website broker, sell your website
Why is this domain-name available? There are 2 reasons: the owner is retiring; and this name is no longer needed because in the past its web-page was used to improve our then developmental large site and bring more internet-traffic to the portal, now finished.