The exact proxy of this was the A-Rod trade. He was a year younger, coming off an MVP season. Texas got 3 arb years of Alfonso Soriano, and Joaquin Arias who was a low-A wildcard (18 years old, .649 OPS in low-A in 2003). AND Texas paid 37% of his remaining contract. AND his contract only had 7 remaining years, not 10. AND we've had 15 years of clubs getting smarter since then.
I think it's reasonable to assume that Miami, if willing to pay 37% of Stanton's remaining contract and Stanton's deal was 3 years shorter, would have gotten a much better deal.