He's going to want to go somewhere he can compete now so I doubt he's be interested in coming here. He's really, really good though. Fox was the over rated one. Put Sabonis with a good primary scorer and you've got a contender level core imo.
Sacto is 8-5 since the trading the guy who most people thought was their best player. I would definitely do a move with Sacto centred around RJ & IQ. Sabonis is a top ~10 player on impact imo, but he needs to have a primary scorer with him which makes him a bit harder to build around.