We think there are two unused cards in each of these two sets, but they are both in their original unopened cello-wrap.  They were sold by Hongkong Post, which would not allow inspection before purchase, but they turn out to have been produced by a private company and somehow found their way into the Post Office for sale.   The cards suggest people should cut out and fold the bus (or tram) but that would be an expensive way to get a paper model.  Both sets together for $9, or either single set for $5.  Grades: 1