If I'm Dallas, I offer some big, short term contracts at some veterans to keep Dirk happy enough for a season, and then try it again next year.
Brandon Roy and Ray Allen stick out.
I could see that, but Dirk is 34, I don't see the benefit in just prolonging him and the draw of playing with him gets less and less each year. His contract is also massive. I mean if they could get some solid young players and some expiring contracts to go along with them, they would still have a ton of cap space next summer, some solid young guys, and a much better draft pick (and possibly multiple draft picks). That just seems like a better option to me given Dirk's age (if he was even like 30, I think your option would be the best one, but I think Dirk is just too old at this point to think he can be a main component of a title team).
But I think at the end of the day the argument to trade Dirk is a lot like the argument to 'blow up' the Celtics:
Yes, it'd great to be able to trade Dirk for assets but you don't do it just to do it. And I don't see a team that's going to give you anything near enough where you'd consider moving him. He's 34, any team that's going to want to acquire has to think they can legitimately compete within the next 2 years.
It is a similar argument, but Dallas doesn't have a Rondo and there is just one Dirk vs. two+ "Dirks" in Boston (KG, Pierce, and Allen to a lesser extent).
Dallas was the 7th seed and just lost its starting PG and super sub. There is no one they can add this year that will even make up for Kidd and Terry, so I think there is a very real possibility they don't even make the playoffs in the very deep western conference.
Dirk has a no trade clause, so he isn't going anywhere he doesn't want to go, it just seems like to me they should explore trades.
I think these trades are very reasonable deals for the Mavs and the acquiring team would be a pretty solid contender (so Dirk might actually go there).
Minnesota - Pekovic, Williams, Webster, Miller, 2013 1st (top 3 protected)
Chicago - Noah, Deng, 2013 1st
Philadelphia - Turner, Harkless, Brand, 2013 1st (top ten protected)
Indiana - Granger, West, Hansborough (Dallas also trades Marion)
There are a few other trade packages that might be worth exploring involving Atlanta (josh smith), Denver (gallinari among others), Golden State (curry and lee), etc.