2.3 Sale by description (1)Sale by specification 2)Sale by grade ◆(3) Sale by standard (4 )Sale by trade mark and brand 5)Sale by name of origin (sAle by descriptions and illustrations2.3 Sale by description  (1)Sale by specification  (2)Sale by grade  (3)Sale by standard  (4)Sale by trade mark and brand  (5)Sale by name of origin  (6)Sale by descriptions and illustrations