The reason Miami would trade Stanton is to massively cut their budget and set themselves up with 4-5 highly promising or proven players to go forward with.
They may pay a tiny bit of the deal, if it meant getting much better players than if they did not, but I doubt they take any significant salary in return, unless it is cost-effective player.
No Price.
No Castillo.
No HRam.
Certainly not 2 or 3 of them.
Now, maybe with the Cuban population, we can get them to take Castillo, but he's no help off our luxury tax budget, and if we did include him, we'd probably have to add another top prospect or go from something like Beeks to Groome as one of the prospects included.