Outside of last year, Arenado has consistently posted an OPS+ in the neighborhood of 130. That's about an .830 OPS at Citi, which is nothing to sneeze at coming from the best defensive third baseman in baseball, but it's also not spectacular. We can totally afford to walk away from the table. They might not. I see no point in giving until it hurts, or even giving until it itches. I'd offer Cano, Betances, and Matz. If they want one of Alonso/Smith/Nimmo/Conforto, they'd better be throwing in German Marquez.