Point guard is an increasingly deep position in the league. However, that only makes the elite ones all the more important. Teams looking to challenge the league's top franchises realize that Rondo could provide them a distinct advantage at a key position.
With the Boston Celtics currently going through a massive overhaul, everyone is fair game. Regardless of what Ainge may say, Rondo can be had for the right price. That price is steep and unlikely, but it is there and he'll know when he sees it.
Ainge isn't allowed to move any of his spoils from the Brooklyn Nets trade in another package for two months. Outside that move and the Brad Stevens hire, Ainge has had a very quiet free-agency period. That has to be gnawing at him somewhat.
A few teams in the league are a step away from legitimate championship contention, and Rondo could be that experienced missing link.
Other teams are adrift in a sea of unknowns. Rondo could give a team direction and leadership.
Point guards are everywhere in the NBA, but passing up an elite one would be a huge mistake.