A couple of days ago, Ryan Sutton explored the city’s current crop of white-truffle dishes, from the underwhelming (a $65 pizza at Colicchio & Sons) to the extremely pungent (the aforementioned truffle burger at Burger & Barrel). (Left out: The recession-friendly truffle dinners at Sapori d’Ischia.) Sutton mentioned an Italian friend who prefers shaving them at home, because they’re cheaper, but where, exactly, is the best place to score them? On November 21, it’s a safe bet it’ll be Eataly: That day, we’re told the market will be selling white truffles at cost, or about $5 per gram. What’s more, shavings will also be at cost at the various restaurants — for a $25 to $30 supplement, you can get them on fonduta, risotto, tajarin, and even anchovies (imagine the smell of that).