The primary advantage of an aged domain name is that you can promote your NEW domain much harder than an aged domain.
The age of your domain name is quite an important part in the puzzle of ranking your website in search engine results.
The thought process is that domains that were registered a long time ago have likely been developed over time.
This helps the search engines 'trust' in the domain as they see it as a good source of information.
Additionally, the site previously on the domain name has already been developed.
This means there may already be links all over the web that point to the aged domain.
This gives the search engines even more reason to believe that the domain is a trustworthy source of information.
Building this sort of online trust can be an extremely difficult, expensive and time consuming process.
Aged domains can give you a vital boost.