[Esel Mann]

A search reveals these for sale but from my quick perusal all are.... Empty.

I'm sure with a little more effort one could find a buyer but would it be worth the effort/time for this one single item? That would be your call.

Try searching "courvoisier cannon bottle unopened".

VS grade, putting it politely, is pretty much good for cooking or maybe, just maybe integration into a mixed drink if one aspires to grab the suckiest host of the year trophy..
Drinking VS grade straight, is pretty much the realm for.... someone already drunk. Bender level.

That doesn't help you too much though. So some thoughts:

Option 1: Transfer the contents into a glass carafe, use that for cooking, and try to sell it empty.
Option 2: Keep the contents in it, and try to e-bay it. It will go to the head of the class because it is not empty. Further the above search may lead to a more suitable place to sell it.
Option 3: When the occasion calls for it, put a bow on it and gift the problem to someone else. Spit ball what you think the gift is worth, toss that money into your dad's off-shore bank account.