Mind Your Language

Okay, this is a tough call. I may be no English scholar, but I'm quite affirmative that it should be 'Open For Sale', not 'Sales'. No? You mean I'm wrong? Scheiße! In any case, I'm reminded of my Marketing Manager who has the penchant of 'pluralizing' nouns according to his own whims and fancies: "We are an international companies which specializes in teacher-trainings and..." You know what's sia suay??