致我們的朋友：資本主義反抗宣言 (二手書交易資訊)

[{"sale_price":334,"disc":104,"prod_count":2,"sale_month":"202008","avg_price":167,"avg_disc":52},{"sale_price":212,"disc":"66","prod_count":1,"sale_month":"202009","avg_price":212,"avg_disc":66},{"sale_price":138,"disc":"43","prod_count":1,"sale_month":"202010","avg_price":138,"avg_disc":43},{"sale_price":154,"disc":"48","prod_count":1,"sale_month":"202012","avg_price":154,"avg_disc":48}]