He's either going to sign the extension he wants in TB or he'll end up on the Rams next to Donald for a 6th round pick and somehow they won't get a cap hit either.
In all seriousness, I really think he'd be a missing piece. If you could guarantee a championship in his time here, I'd make almost any trade and let us go into whatever long term cap hell there is. But since that's never guaranteed, I really don't know what I'd move for him. If the Bucs agreed to take back a Palmer or some other bad contract, I'd be willing to pay a lot more draft capital (and OVERPAY). But if it's just acquire Vea and the Bucs don't take on a contract, then I'm not giving up a pick good enough to really entice them.