Yanks Want David Freese?

So the Yanks are rumored to want to trade for David Freese, the Cardinal 3b and former WS MVP.   He's not a bad player. in fact, he's had at least one really good season, two years ago.   But he is 30 and coming off an subpar year but not below average.   He could be declining.   So what do you pay for that?    We'll see if they have a match.  The last thing they need to do is restock the Cards farm that churns out guys who can play ever day.