Here's what MLB insiders think it would cost to trade for potential Mets target J.T. Realmuto'He's the most valuable catcher in baseball and they can't afford to mess it up'11/14/2018, 7:00 PMSep 7, 2018; Pittsburgh, PA, USA; Miami Marlins catcher J.T. Realmuto (11) throws to first base to retire Pittsburgh Pirates starting pitcher Chris Archer (not pictured) during the third inning at PNC Park. Mandatory Credit: Charles LeClaire-USA TODAY Sports / Charles LeClaire