As I pointed out in another thread, Golden State previously turned down a trade of Biedrins to Houston for Hashem Thabeet and Jordan Hill and they chose to keep Biedrins and amnesty Charlie Bell instead, while withdrawing their qualifying offer from Reggie Williams and waiving Jeremy Lin, to clear cap space to sign DeAndre Jordan to an offer sheet that was matched.
If you offered Jermaine O'Neal, Kenyon Dooling, and a #1 for Biedrins, Golden State might ask for more.