D Revis injury doesn't have anything to do with his trade value. ACLs injuries are very routine surgeries today and no one trades for a player without giving them extensive examination. (they will go over and see how the leg is progressing) This is the last of a teams concern.
You might wish that to be the case but the idea that any team looking to pay out the kind of money that will be needed to acquire Revis isn't going to think long and hard about injury history and especially with a guy up around 28 or 29 years Old as and when(or if) he becomes available is laughable.Sure anecdotal evidence of other players recovering well such as Adrian Peterson is a consideration too but I would want my front office to absolutely take this into account.
Personally I think it's a risk I'd be willing to take with DR but if I'm tied into a Mario Williams style contract for the next five or six years with a guy who has missed time in 2 of the last 3 seasons(not to mention his history of never being happy to honour a deal) then I would be distinctly nervous.