Over the last few years there have been a number of stories about wine collectors being ripped off by forgeries. Here is a new one. http://www.rawstory.com/rs/2013/12/12/federal-prosecutors-dealer-passed-off-fake-laboratory-wine-to-drive-up-auction-prices/
As many of the wines that have been involved in these scandals have been of doubtful drink ability even if authentic, the obvious solution is to buy wine to drink, not as a collectible. If you want to be a collector get into stamps or hummel figurines.