Wine Valuation/Rating

[ellemasse]

Hello - I'm new to the world of wine but do have 3 bottles I would like to have more info on. 1) 1978 Clos du Bois Proprieter's Reserve Cabernet Sauvignon 2) 1983 Clos des Papes Chateauneuf du Pape and 3) 1983 Stag's Leap Cabernet

Is there a web site I may go to to find valuation, pricing, when to drink, etc?
Thanks and Happy New Year,
Elle