Depending on what the domains will be used for the different stats of the domain will be more important than others but age is, IMO, almost always a secondary requirement.
As an example I did a short test with my expired domain hunter tool and after just a few hours I found 44 .com domains with age of 12-16 years, including non .com domains it was 149. Of the 44 .com there was a DA20.
If I was not to limit by age I can find a 9yr old domain with DA35 which I would much rather have than a 12yr old DA14.
I'm not saying your domain is worthless, just that I find age to be secondary once it gets past a few years old.