Oh, in that case, it's not even remotely possible. I've been to China, and speak Chinese, and I assure you they'd no more sell Taiwan than we'd sell California or Texas. This idea may make sense to you, but it's outside the boundries of reality for the Chinese.
Whole 'nother thread on this: http://www.freerepublic.com/focus/f-news/1795084/posts
As you'll see, my take is 180 degrees away. Chen is playing brinkmanship, trying to provoke a war to save his sorry ass.
Most Chinese & Taiwanese on the island do not seem to favor formal independence from China. And they certainly do not want the war that will inevitably come from Chen's poker game. Chen is a social democrat, not really a "conservative." He's allabout "diversity," "multiculturalism," and the whole nine yards of socialism.
How can you be sure? Have you asked?
I suppose you may be right, but China may be more amenable to such a deal if it knew the US would intervene in a fight.