When Vida Blue nearly became a Cincinnati Red
https://www.redlegnation.com/2016/02/01/when-vida-blue-nearly-became-a-cincinnati-red/
First Finley tried to sell him to the Yankees. Kuhn vetoed it. So Finley tried to trade him to the Reds for a no-name player (Dave Revering) and a whole bunch of cash. Kuhn vetoed it.
Finally, Finley traded him across the Bay to the Giants for seven players and $300,000 cash. (A lot less cash then Finley would veh gotten from either the Yankees or the Reds.)
It still ticks me off that the trade was voided by the commissioner.