Manny was owed a lot of money, so it's not really a fair comp. Nobody has ever trade a salary even close to this for just prospects.
The closest comp I see out there was the AGon, CC, Beckett dump on the Dodgers, but even that trade involved LA taking CC in order to get AGon.
Maybe Miami might force Prado on the team taking GS, but that should, in theory, lessen the return needed.