Wine Prices

Hello,
So today me and my parents bought some wine bottles here in Portugal, the bottles come from France and most of them have 20 years but we bought them for only around 17€ each so we thought it would be a very good business since the wines are old and apparently they come from good producers, but we do not know a good web site where we can find trustworthy informations of the prices so yeah, I mad this thread so you guys could help us, we never know who's surfing Z8s forums! ;)

Wines:

Chateau Lagrange 1992 Pomerol
Pommard Premier Cru 2000 Domaine Bouchard Pére & Fils Chateau de Beaune / Côte D'Or
Mercurey 1er Cru "Les Naugues", GrandVin de Bourgogne 2001
Domaine des Houdières FLEURIE Cru du Beaujolais 1998
Château Beau-Site Cru Bourgeois Saint-Estèphe 1998
Domaine de La Vougeraie 1999 Pommard Les Pe**** Noizons Grand Vin de Bourgogne
Fery~Meunier Pommard 1er Cru Les epenots 1997
Chateau La grave a pomerol Trigant de Boisset 1992
Nuits-Saint-Georges 1996 Domaine Chezeaux Bernard & 1998

Thank you,
;)

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