I'm guessing you're after a relatively mint condition one? Price?
Have one available (only a week and a half old

) but it got scuffed at the edge of the right eye area when i dived for a barrel last Saturday. Doesnt impede vision at all, given the position of the blemish in relation to your eye. That's the only thing that is wrong with the lense. Will sort out a pic if interested.
Dont mind keeping it but just from an aesthetical point of view, i rather shell out for a brand new one and recoup some funds through the sale of this one.