Santa has a velvet rucksack. Carrie Kraft has black plastic trash bags. Fitting, in a way, because at some point all of these sweaters were somebody’s trash. Her boyfriend Stan Darke (who owns the Factory, the vintage shop in Fairfax, Virginia, where she works) has the receipts to prove it. Two years ago, he bought between 200 and 300 sweaters. Last year, 600. This season: 1,600 ugly Christmas sweaters, all of which must be sorted, priced and hung to await their festive future.