John Collins could be a good buy low candidate if we get some assets to go with him. I think the biggest issue with him not living up to his contract was his 3pt shooting fell of a cliff, but I think that's easily explainable by his injured finger. There were signs towards the end of the year that he was figuring out his shot. I know this is a super cherry picked number, but his last 12 games of the regular season he shot 44% on 3s, and he shot 34% on 3s in the playoffs.
I think the problem with Collins is that *IF* he gets his 3pt shot back then he would probably just be worth his contract where he still has 3 more years (last year being a player option). Thus the need for assets to come with him since the team taking him is assuming the risk that he gets back to where he was.