闲鱼也改变了知识付费赛道：
彭博+各大投行研报，原价5万元/月，闲鱼价9.9元
生财有术，原价3365元/年，闲鱼价50
薛兆丰经济学课，得到原价199，闲鱼价4.99
吴彦祖英语课，原价398，闲鱼价1
孙宇晨财富自由之路，初版价199，闲鱼价0.1
From X
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