Late singer wore the sweater when Nirvana recorded 'Unplugged' album
                                
                                
                                    (Newser) -
                                    It is, as the  BBC  puts it, a "stained, cigarette-burned cardigan unwashed in nearly three decades," and had you been a little more on top of the situation, it could have been yours for $334,000 on Saturday. The olive green, mohair cardigan in question commanded such a...