If the Lions don't pay Suh what he wants, and he ends up leaving, the screw-up will have been not trading him before the draft. He clearly had no interest in signing this off-season.
We can't force a team to trade with us. Obviously Suh is valuable and should be as a trade chip. We can't force teams to take him for what we want, and we shouldn't trade him for jack shit also. I'm guessing(just a guess mind you) that there were teams that called us up, but a deal couldn't be reached.