Compare Prices

[plonk]

...and another question. I'm looking for a website where I can compare prices. Now it takes me a long time to find a wine and its price online - I guess there will never be a complete list, but which one can you recommend?

These are all probably cheap wines, but if anyone has an idea what the prices are, please let me know:

Bordeaux:
(1) Chateau Mayne D'Eyquem (2001)
(2) Chateau De Ricaud (1999)
(3) Seignouret, Chateau Haut Barade (2000)

Merlot:
(1) La Crosse (2000), Napa Valley

Cabernet Merlot:
(1) Black Opal (2000)

Chardonnay:
(1) CK Vineyards, Willow Springs (2001)

Thanks in advance!