Yes, madison, what you get for him now may be the best you can get for him, but that is not going to be much, and doubtful anybody that will help your team. Everybody in the league had the same opportunity to draft him. He is not doing anything unusual, it is not like he is performing like Brian Roberts here. He is doing the same thing he always does, getting saves with bad numbers. If you play in a league with idiots, then yes, you may get something useful. If not, which is likely the case, you're not going to get anything. The other players would just as soon have him left on your team for the damage he does your WHIP and ERA, or just taking up a roster spot if you bench him. You can't trade high for a player who is not outperforming his history. You can only trade for what his actual worth is, which with Graves is not that much. He is not a big secret or surprise.
Trading high would be somebody like Roherts or Garland, who are outperforming their past history.