For better or worse, the Magic do a very good job at retaining their own guys. For as bleh as they've been, they do seem to have a lot of consistency within their roster and they've at least made the playoffs the last couple of seasons. This isn't a bad thing for a small-mid market team giving the fans a team/players to root for. It's hard to see them breaking out this season, though, so they could definitely be sellers sooner rather than later...but at least they'll have something to sell, because they've been able to re-sign their own players.
That being said, the Isaac deal seems like a no-brainer. I'm impressed they were able to get him to sign for that low. If I were Isaac, I probably would have taken a chance on myself this season, even with coming off an injury. And the Fultz deal isn't that bad. We don't see him a lot in Orlando, but he has quietly resurrected his career and he is still very young.