說出影響力：人人說話都能有份量的26種技巧 (二手書交易資訊)

[{"sale_price":189,"disc":"68","prod_count":1,"sale_month":"201811","avg_price":189,"avg_disc":68},{"sale_price":149,"disc":"53","prod_count":1,"sale_month":"201812","avg_price":149,"avg_disc":53},{"sale_price":370,"disc":133,"prod_count":3,"sale_month":"201901","avg_price":123,"avg_disc":44},{"sale_price":190,"disc":"68","prod_count":1,"sale_month":"201902","avg_price":190,"avg_disc":68}]