To compile this list, "First Sip" began with the top 100 highest rated domestic wines and cross-referenced them with the number of bottles produced of each. This list was then sent to more than 400 of the nation's elite wine retailers for a massive inventory of all available bottles of each wine listed. The results were then calculated to determine the most difficult-to-find U.S. wines.

They are, in order of rarity --
 

Here's an example of how rare these wines actually are: Take Maya made by Dalla Valle Vineyards. Wine critics rated the 1992 and 1994 vintages each a perfect 100. The bad news? Dalla Valle only made 480 cases of the 1994 vintage. That's 5,760 precious bottles in a world made up of hundreds of millions of wine drinkers.

And that's practically a mass production compared to the paltry 175 cases that Screaming Eagle released of its highly-regarded 1994 Cabernet Sauvignon Napa Valley.

"First Sip" goes through this entire process every single month, publishing its findings and listing the retailers nationwide that are actually carrying these "impossible-to-find" wines. "First Sip" is the only wine publication providing this service.