Aged domains are usually preferred by Google as solid and trustworthy domains. The domain will have a higher domain rank and page rank. Though there are no longer the official PR10 type of page ranking set ups. There’s no denying that the sites are still being rated and that the aged domains win every time.
Aged domains also have many backlinks and possibly traffic coming from other aged or related websites, blogs or forums.
Many businesses prefer to use aged domains so they know they will get the type of traffic they need.