拉普拉斯的魔女 (二手書交易資訊)

[{"sale_price":1238,"disc":311,"prod_count":6,"sale_month":"201711","avg_price":206,"avg_disc":52},{"sale_price":630,"disc":158,"prod_count":3,"sale_month":"201712","avg_price":210,"avg_disc":53},{"sale_price":2221,"disc":558,"prod_count":10,"sale_month":"201801","avg_price":222,"avg_disc":56},{"sale_price":1552,"disc":389,"prod_count":7,"sale_month":"201802","avg_price":221,"avg_disc":56},{"sale_price":1722,"disc":432,"prod_count":7,"sale_month":"201803","avg_price":246,"avg_disc":62},{"sale_price":958,"disc":240,"prod_count":5,"sale_month":"201804","avg_price":191,"avg_disc":48}]