If you provide me with your address, I would be happy to dispose of any 1st Growth Bordeaux for you, for no charge, and at my own expense.

I would even be willing to dispose some of the better 2nd Growths under the same terms.

Actually, all kidding aside, you can sell wines of this caliber through the Butterfield and Butterfield auction house.


Edit: FYI, Butterfields was acquired by the British auction house Bonhams, so they are now known as Bonhams and Butterfields.
Here is a link to their wine department. I have sold wines through them prior to their acquisition by Bonhams.

http://www.bonhams.com/usa/wineusa/