Well they won't get anyone to trade for him. Only way it can happen is to cut him, and then the Lions still take a huge hit.
The problem has been around for a very long time. Many on here said there would be a day of reckoning, and the Lions are going to have to take a hit one of these years, so maybe they decide to just cut him and take the hit next year, but they will soon face the same situation with Stafford too.
Mayhew should be fired for allowing those contracts. It was absolutely fiscally irresponsible.
Take the hit then. Draft a couple WR's, a OL and a QB.