If you catch the barrel tasting reviews, you can sometimes snag something good in futures. In 2005 I got a case of very cheap halves from the guy who operates Cheval Blanc. The problem is that cheap vineyards are cheap for a reason. Either the land is second rate or management is not so hot, or both. So the combination of lucky factors that makes them hit above their weight in one vintage might not come about in the next miracle year.