What happened with Lebron and Cleveland and also Bosh and Toronto is not applicable here because both those guys didn't need sign and trades to get to their new teams. As a result, Cleveland and Toronto weren't in the position to ask for more than the low first round picks that they got. With Nash, the only way he can sign with the Lakers is for Phoenix to participate in a sign and trade. For helping out a conference foe along with a franchise icon, I think they would ask for more.