鳴鳥不飛（1） (二手書交易資訊)

[{"sale_price":160,"disc":123,"prod_count":2,"sale_month":"202007","avg_price":80,"avg_disc":62},{"sale_price":200,"disc":154,"prod_count":2,"sale_month":"202009","avg_price":100,"avg_disc":77},{"sale_price":365,"disc":281,"prod_count":4,"sale_month":"202010","avg_price":91,"avg_disc":70},{"sale_price":162,"disc":125,"prod_count":2,"sale_month":"202101","avg_price":81,"avg_disc":63}]