wine value

[JoanieD]

Is there an online site somewhere that lists the values of old wines? We have a 1980 bottle of Beringer's Cabernet Sauvignon and the closest I have gotten to finding a value online is that a restaurant is selling a 1999 bottle of this for $190. Being that our wine is 19 years older than that, is it apt to be more value or will it have turned to vinegar? Thanks!

Joanie