I've said this many many many times over but I'm speaking more from the aggregate state of mind, which is why I said 100 Mayers for 100 Martes. the vast majority of those 100 Martes aren't putting up War in their mid 30's that they put up at 30.
Guys might get paid for what they did, but its' better business to predict what guys will do. I think most of us here agree that as guys age they get worse and the 33-35 years are some of the most unforgiven when it comes to decline. 100 vs 100.
Now from a practical matter, again as I've stated over and over again we have more than one hole in the infield. Trading an infielder for an infielder might be nice if it's an upgrade for a year or two but you have the same EXACT number of holes to fill.
I'll reiterate a point I made earlier. The best bet, surest thing we have in our infield is Trevor Story, after him it's Mayer and who else? David Hamilton?
I'm all for trading for Marte, but I'm looking to plug up a whole and expand the lineup not just get a slight upgrade at one position.