Avon's ($19.88, -$1.72, -7.96%) first-quarter earnings fell 82% as the door-to-door beauty products seller's sales continued to slide and it stepped up efforts to stabilize its business. The disappointing earnings drop comes just weeks after Avon rejected a $10 billion buyout offer from closely held fragrance maker Coty Inc. that offered Avon shareholders $23.25 a share.