In the book I write about “Hi-Lo” pricing finagles, by which retailers initially mark UP merchandise so they then can mark the stuff DOWN, then invite us unsuspecting, nitwit shoppers in for a blowout “sale.” While this has long been SOP at department stores, the Web offers a multitude of ways for online stores to play the same game. New York Magazine recently ran an item accusing the Gilt Groupe, one of the hottest and chic-est online “sample sale” sites, of playing fast and loose with erstwhile “original prices.”