How much would you pay for a plate of French fries? A New York restaurant thinks hundreds is fair. Serendipity 3 is bringing back its ‘world’s most expensive fries.’ The restaurant uses champagne, truffles and 23K edible gold dust to make the treat, which will cost you 200-dollars. The restaurant, which is on the Upper East Side of Manhattan, previously earned the Guinness World Record for the world's most expensive french fries with the menu it