For me two that spring to mind are the Bucks wanting Ellis instead of Curry, and the Hornets not taking a bunch of Celtics picks to get Winslow on draft night as I believe one of the Tatum/Brown Nets picks was going to be included.
Pre championship run Klay almost being traded for Kevin Love
Kevin Love for Klay Thompson was floated for a long time. Good chance the Warriors dynasty looks a lot different if that had gone through. Fun fact: it didn’t happen because Jerry West put his foot down and wouldn’t let the Warriors do it
Shawn Kemp and Scottie Pippen were almost traded in 1994.
https://www.reddit.com/r/nba/comments/15vp658/pippenkemp_trade_being_discussed_during_the_94/
I remember Jimmy and PG being in Celtics rumors way back.
KG to the Lakers. Didn’t happened because KG can’t contact Kobe, as Kobe changed his number that summer
Shawn Marion for Kevin Garnett trade would have been huge. But Marion said he wouldn’t resign with a team that wouldn’t give him a max. so we got washed shaq instead
Kobe to the mavs