內容的力量：不販賣商品！用「內容行銷」讓客人自己找上門！ (二手書交易資訊)

[{"sale_price":610,"disc":191,"prod_count":3,"sale_month":"202006","avg_price":203,"avg_disc":64},{"sale_price":370,"disc":116,"prod_count":2,"sale_month":"202007","avg_price":185,"avg_disc":58},{"sale_price":340,"disc":106,"prod_count":2,"sale_month":"202008","avg_price":170,"avg_disc":53},{"sale_price":704,"disc":220,"prod_count":4,"sale_month":"202009","avg_price":176,"avg_disc":55},{"sale_price":420,"disc":131,"prod_count":3,"sale_month":"202010","avg_price":140,"avg_disc":44},{"sale_price":230,"disc":"72","prod_count":1,"sale_month":"202011","avg_price":230,"avg_disc":72}]