De Gea's meant to be on £350K per week, so little chance him wanting to move on wages that he may not get elsewhere. I saw a similar piece that quoted De Gea, in it he said he'd like to create history at Man Utd and spend years at Old Trafford, insisting that he had no intention of giving up his position as MU's number one keeper.
It's a shame that we're still 'new kids on the block' where the Prem's concerned, as although our financial position has improved, it's a relative improvement where, and this I hope summarises things exactly, we thought carefully about spending £22 mil on an up and coming midfield player. Henderson's position is quite different, and in a short space of time Henderson's stock has risen, to the point where I'd wager a starting point for his services would quite easily be £35, and that's a conservative estimation on my part.
Over the space of the next season, and it makes sense for Man Utd to have Henderson playing first team football rather than 'starring' in the reserves, Henderson's significance and value will grow exponentially if the standards he's set are maintained. If we could afford him I'd wager we should pay the fee, but that's unlikely at the moment, so as things stand, another season as our 'keeper works both ways. Henderson underlines his value in what's an already developing side, and he helps us maintain our position as a Prem club, hence we look an increasingly attractive proposition to any other 'keeper should Wilder decide he wants to buy someone at an affordable price.