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":351,"disc":125,"prod_count":2,"sale_month":"201803","avg_price":175,"avg_disc":63},{"sale_price":196,"disc":"70","prod_count":1,"sale_month":"201805","avg_price":196,"avg_disc":70},{"sale_price":130,"disc":"46","prod_count":1,"sale_month":"201806","avg_price":130,"avg_disc":46},{"sale_price":679,"disc":243,"prod_count":6,"sale_month":"201807","avg_price":113,"avg_disc":41},{"sale_price":95,"disc":"34","prod_count":1,"sale_month":"201808","avg_price":95,"avg_disc":34}]