If you've had proper storage, the '66 BV GdlT is probably worth $100.
My guess is a Sebastiani would be worth more like $20. I could be
wrong, Tom S. might have more info.

Winecommune.com is best bet for selling yourself. Winebid.com is
another possibility.

Prices will be much lower if bottles are in iffy condition or you can't
prove good storage.