Hmm, i checked on Snooth and there's no price information or too many indicators for wines from this Chateau. There are some wine matches, but from different vintages.

I would have said you should email the winery and ask them directly. 20 years is certainly long enough for even the most tannic monster to have aged well. The wine's from Graves, so its probably got enough tannin to age well.

I googled the name of the winery and snooth's page came up first, but i couldnt see a link to the winery themselves sadly. sorry.