Winery Exclusive Wines

[Jaebster]

I am planning on taking a trip up to wine country (Napa-Sonoma, California) next month and I have heard that some wineries (such as Chateau St. Jean) have wines that they only sell from their winery (not marketed anywhere else). If anyone knows of any of these "exclusive" wines of good quality in the range of $10 - $30, please post message or e-mail me. Please be specific is to winery, type, name, and vintage. Thanks, I really appreciate it!