Greg Monroe has an effective no-trade clause because he signed his offer sheet. Due to the fact his Bird rights do not transfer, since he's on a 1-year deal, the Celtics (or any team acquiring him) would have to use cap space to re-sign him next year. Thus it is a) silly to trade for him, since we might not have the cap space to keep him, and b) silly for him to agree to be traded, since it could cost him money on his next contract.
Just so you know A) Team will have the cap space unless they take on more non-expiring deals. Only 42* million committed to 2015. B) Pistons are the only team that could sign him to above market level max or extra years and they already said no which is why he got stuck with QO. He has to go somewhere else and in that case bird rights never mattered.
People have to stop saying Monroe can't be traded for. A risk yes if he doesn't resign, impossible to get no.
Just so so you know:
A) This trade increases the Celtics salary obligations next year, since Smith makes $13.5 million.
B) Draft picks have cap holds too, and the way we're playing ours will have a pretty large one.
C) Rondo will have a max cap hold. Even if Rondo signed a less-than-max deal, there would not be any cap room left to give Monroe near what he wants since you have Smith on board. Unless you want to have Smith and Monroe with no Rondo, which would be different than every argument I've seen on this board for the last three years, since the #1 pro-Smith argument is that Rondo would help his shot selection. And most pro-Monroe arguments think he pairs nicely with Rondo too.
D) There were many reports over the summer that Monroe hates playing with Smith, so I don't know why you think he'd agree to be traded with him to Boston and then re-sign here to boot.
E) Even if this were a different random message board trade that didn't include Smith, Monroe still risks losing money in his next contract if he agrees to any trade anywhere. Since his Bird rights do not travel with him to his new team, he cannot be part of a sign-and-trade next summer (unless he gets no more than 120% of his current salary, which is about half of what he's looking for). This limits the number of teams he can potentially sign with. It's a pretty basic rule of economics that if demand drops and supply is held constant (there will be the same number of Greg Monroes available), the price drops. Unless he's so coveted that he's likely to get the max regardless, he very well could find himself with fewer options, and thus less negotiating power. Players just don't waive that no-trade power unless they're sure they'd be going to a better situation. If we were looking like a solid playoff team, it might be a different story, since performing well in the playoffs could increase his value, and if nothing else he'd get to experience winning, and get extra money from his playoffs share. But we're not looking like that any more or less than Detroit is, so it's moot.