巷仔口社會學 (二手書交易資訊)

[{"sale_price":2046,"disc":539,"prod_count":8,"sale_month":"202005","avg_price":255,"avg_disc":67},{"sale_price":961,"disc":254,"prod_count":4,"sale_month":"202006","avg_price":240,"avg_disc":64},{"sale_price":1296,"disc":340,"prod_count":5,"sale_month":"202007","avg_price":259,"avg_disc":68},{"sale_price":745,"disc":196,"prod_count":3,"sale_month":"202008","avg_price":248,"avg_disc":65},{"sale_price":983,"disc":259,"prod_count":4,"sale_month":"202009","avg_price":245,"avg_disc":65},{"sale_price":769,"disc":203,"prod_count":4,"sale_month":"202010","avg_price":192,"avg_disc":51}]