Question about aged domains and them ranking for keywords

I was reading in the commission blueprint evolution source how they recommend you buy a domain that is at least one year old for use in building silo based affiliate sites.

It also mentions that you may be able to find a domain that already "ranks" for a specific keyword or group of keywords but it doesn't tell you how to determine if it ranks at all for any keywords?

There is not a setting on the go daddy site for this, unless they are just referring to existing traffic to the domain?

It there a tip or source I am missing in order to find out if an aged domain up for auction on go daddy ranks for any keywords?

Thanks!

The only way you can rank for any keyword is to have a site up and have some content. And godaddy auctions are for domains not for sites. They are just plain domains, so they won't be ranking for any keywords.