Other than the Kwame Brown part, I can see your points. Interestingly, on many of the teams showing interest, Posey would not be as a valuable as he would on the C's. There is a reason he didn't command huge attention in last year's market. Winning the Championship in Boston has brought him a higher profile now, but wasn't he already a key cog in a championship team in Miami and wasn't all the press last year when we signed him that we brought in championship experience, i.e. a winner?? So how has his rep changed so much because he contributed again, in a way he already had? Some of it is the current market and the people's tendency to remember best what has happened so recently.
Yes, Posey was a huge contributor on the Celts last year, but he would never have been in those clutch situations he is known for if not playing on a team that was capable otherwise of getting that far. People seem to forget the long stretches during the year when the second unit, with Posey included, struggled mightily to find any offense without any of GPA on the court. Posey's greatest value is as the glue guy who fits in the gaps of other stars, doing the dirty work, enjoying the role, not wishing he was one of the teams best 3 players as a younger player might who reluctantly takes this role, but aspires for greater things. On a team not top-loaded with talent, Posey would not be nearly as valuable, his greatest strength is being the 5th option and knocking down open shots created by the guys everyone is covering closely. Yes, he plays good defense, but he only averaged around 20-25 minutes, less than half the game, so that skill should not be overvalued either.
My point is, even on Cleveland, he would not be nearly as good, having to do more than he is capable of, requiring more of him than his talent dictates. There is a reason he has been a 25 minute a night player for the past several years, he is not really starting NBA material. Anybody who put him there, would be disappointed, as without other great players around him, his skills would not matter nearly as much, his limitations would be exposed. We'll see if he goes strictly for the money, but the C's are the best fit for what he brings to the table. Don't forget, the C's had to actually be in the Finals for Posey to have gained his most recent rep as a big game player, if he is on a playoff team, but not a championship caliber team, more will be asked of him than he is capable, and he won't be effective playing 35 minutes a game. We all love Posey with good reason, but let's not mistake what level his talent really is as we remember the most recent series we watched him play. If Posey is honest with himself, he realizes in a basketball sense, Boston is the best place, if he is all set with rings and wants more cash, he can get that elsewhere, but he risks being an overpaid role player who will disappoint whichever teams' fans he signs with, unless they go all the way or almost all the way and James plays a big role in that run. That of course is the hope in signing him, but is it really worth tying up one of the most financially valuable resources a team like the C's have that is over the cap, for the next 5 years? That is a tough thing, even though as a fan, I want to see James back next year. They would not have won without him last year, but we have no way of knowing if that will be true for a 20 minute a night bench player for the next 4-5 years.