Not fair at all. Why would he give up (presumably) the second or third highest scorer on his team with no one to replace him with? When you offer trades like this its usually to address a flaw on both teams, or to get rid of excess talent at a particular position. You would effectively be opening up a gaping hole in his roster at the WR position while insufficiently closing another hole at QB. Anyone who accepts a trade like this doesn't have a clue at what they are doing.