Offer him what you believe he is worth. If he declines. Ask him if he would prefer to be traded or to mentor the other QB’s on the roster and make him the highest paid clipboard holder in the history of the NFL. If he decides to sign do not give him another no trade clause.
It is highly likely Jerry Jones has already communicated an offer expressing his valuation of Dak Prescott's current worth. No news means Prescott disagreed and Jones has either not extended another valuation or
has extended another valuation Prescott has rejected also.
Additionally, it is just as likely Jones has already asked about a trade to stimulate extension negotiations. It would not be necessary for Prescott to agree to a trade if the tactic was successful in igniting discussion between both parties.
However, it would also be an opportunity for Prescott to re-emphasize either his rejection of all trade scenario
or stipulate specific trading partners he would only agree with. Franchise quarterbacks have been known to include this stipulation in their contract. If true, contract talks may have stalled because none of the teams, Prescott has specified, have communicated their desire in acquiring him to-date. The possibility exists that one or more teams might consider contacting Jones during the draft if it fits their plans. The possibility is low in my opinion though.
There is an exceptionally low possibility of Prescott taking a demotion with Dallas. The scenario increases somewhat with another team but that needle will barely move towards that happening also. This particular scenario has rarely happened and when it has, it is because the player has accepted the reality of becoming a backup quarterback. There has been zero indication Prescott desires voluntarily going through that transition right now.
Even Jones is not ignorant enough to agree to another no trade clause
if he and Prescott agree to an extension. Prescott has reached the stage of his career where he cannot command the stipulation since Jones' valuation of him does not demand it.