So you buy the $8 wine and the $30 wine. Since it's almost certain all the wine from the same batch is going to be similar quality. If you get a good $8 bottle

So you buy the $8 wine and the $30 wine. Since it's almost certain all the wine from the same batch is going to be similar quality. If you get a good $8 bottle you go back the next day and buy a couple cases of the good/ cheap stuff. If the cheap stuff is not-so-good, drink the $30 wine and use the cheap stuff to cook with. This way you are guaranteed good wine.