Firstly, no trade clauses are meaningless. The various parties, including the players agent, always discuss potential trades in advance and the clause will be removed if a deal is agreed.
It will cost Dallas to move Dak on. Trade value is less than real value as there is always a risk a player wont gel with the new team. This risk comes with a price.
Also, cap hit is important. Will mean additional cost/credit depending on whether the players cap hit is more/less than perceived value.
So, if you think Dak is a genuine 40m per year QB, you will have to either give away a draft pick or retain some of the cap hit in dead money in order to trade him to a team that believes he's 40m per year.
If you think he's worth only 35m per year (which is still elite money) then you're giving away another draft pick e.g. a 2nd rounder or absorbing an additional $5m per year in dead money in addition to the risk cost in order to trade him.
If other teams value him much less than elite, then you're either absorbing most of his salary in dead money and/or parting with several high draft picks to trade him.
The only potential trade partner I can see is Houston. Need a QB, potentially has the cap space (if Watson moved on). They have a mediocre front office which is under pressure. It could potentially cost us e.g. a first and second rounder to trade him with the full cap hit to the Texans assuming the Texans like him.
