Not a great gauge of value. Teams generally don't make offers to role player in RFA. Neal didn't get a single offer but once renounced he had several teams interested. He wound up signing with Milwaukee. He didn't have a good season last year, this season he has been an above average center making only $2 million.
Either way Baynes is ,likely, going to have a minimal role in the postseason. There will be series where Diaw will need to start, pushing Splitter to the bench and Bonner into the 4th big spot.
Against teams like Portland, Dallas, and maybe Memphis. He would be the 4th big and probably max out at 15 mpg. Ayers won't play either way. I don't think moving him will have have much of an impact either way unless of injury.
There are teams that could use some additional size. If its just for a second rounder then, its likely a no-go. If its for a young out of rotation player on a rookie scale deal (i.e Plumlee in Phoenix) then it would be more of a possibility. That assumes Baynes thinks he could have a future in Phoenix (he has to consent to any deal)