My take is this:
If Ray wanted to retire a Celtic, and that was a major thing for him, it would be done already. Seriously. So let's keep that in mind, no matter what is said. Actions speak loudest.
Danny saw this year that Ray's still a very good player on both sides of the ball, but in our offense, he's mainly a shooter/defender. Or, more importantly, Rondo sets things up, Pierce, KG, and Rondo are all competent bailout shot guys, and Ray's major, main role is to shoot and defend. That can be replaced without breaking the bank, so no need to break the bank on Ray's deal.
Ray's value to the C's could legitimately be less than it might to another team that might need more of what he has to offer (do we need his veteran leadership? we've got that covered. Defense? Um, no. Ball handling or playmaking? Not really. we just need him to shoot, and score.)
I totally disagree. I think Danny and Ray both want to see what his market value is. Ray doesn't want to take 6 million a year to find that New York would've given him twice as much and Danny doesn't want to pay him 10 million a year to find out that no one would've given him more than the MLE.
Also, I think Ray does a lot for this team. During the regular season he averaged more minutes than PP. Why? Because he does more than shoot or defend. While I'd hardly call him a playmaker, he is a reliable ball handler that can bring the ball up against opposing 2-guards. Given that we didn't have a reliable backup much of the season, this was important.
And without even going further down this road, what options do we really have but to re-sign him? Give the team's age, it looks like the C's are going to have to bring back the core, plus do well with the Sheed trade, the MLE, and some minimum contracts to make another at a title. Losing Ray pretty much takes us out of contention.
Of course there could be a sign and trade; however, there are a few catches to that:
1) Many teams who want him will have cap room already, mitigating the need for them to give us anything.
2) Rebuilding teams aren't going to want him, hurting our chances of getting young stars.
3) If we trade with a team over the cap, we're going to have to take back (close to) equal salary. That means that if the C's don't want to pay Ray 10 million, they're going to have to want to pay whoever is coming back close to that number. And I can't think of many players who would be coming back at that number who would help us more than Ray.