Struggling consumer electronics retailer Best Buy (BBY) posted worse-than-expected third-quarter results Tuesday, sending its stock falling in early trading. The Richfield, Minn.-based company reported earning minus items of 3 cents a share, down 94% from the year-ago quarter and missing Wall Street's target of 12 cents. Using generally accepted accounting principles, which include items, Best Buy lost 4 cents a share for the quarter ended Nov. 3,