1) Why do you want to get rid of Helton?
2) Why would you get a now part time closer (Nunez) and give up a full time closer (Graves)?
3) Why, in addition to that, would you give him Odalis Perez too? Even if it were Oliver Perez of the Padres, it wouldn't matter.
Terrible offer, you can do MUCH better for Helton, and MUCH better for a package of those three. Don't accept it.