By Lenn Thompson, Editor-in-Chief $100 for a merlot…from Long Island? Yes. Wolffer Estate Vineyards' Premier Cru (the former name for this wine) is perhaps known as much, or more, for it's price tag than it's quality. But, the wine sells — in part because of the wineries Hamptons locale, but also because it happens to be very good. And unlike some of Long Island's other high-priced "reserve" wines it is only made when winemaker Roman Roth thinks the fruit coming into the winery warrants it. I can respect that. 2005 was one of those years, even though what was a…