同情者 (二手書交易資訊)

[{"sale_price":200,"disc":"48","prod_count":1,"sale_month":"202008","avg_price":200,"avg_disc":48},{"sale_price":424,"disc":101,"prod_count":2,"sale_month":"202009","avg_price":212,"avg_disc":51},{"sale_price":210,"disc":"50","prod_count":1,"sale_month":"202010","avg_price":210,"avg_disc":50}]