Nope, you're very wrong in this case. In many cases, vintage Cognacs can be worth muuuuuuuuuuch more than wine. You cannot just base your assumption that because the bottles are not labeled with the year. If you read Chinese newspapers, people are always on the lookout for vintage hard liquor such as the ones Wyndle has.

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Added on November 22, 2009, 3:07 pmforgot to also mention that just because wines have the year labelled on, doesnt mean they're all good. You were lucky the ones you bought had value. Vintage wine is even trickier to determine the value. For a wine to go from rm40 to rm280 is nothing spectacular, you have to factor in price inflation over the years as well on top of how old the wine is, and whether it has passed its ideal drinking age. I've got a few bottles of reds that are also valued more than rm5k nowadays  .