To my mind,this sentence should go as follows:the market price which/that one must pay for earlier availability
So it can be translated into such a Chinese version:一个人必须为早先商品供应而付的市场价格
To my mind,this sentence should go as follows:the market price which/that one must pay for earlier availability
So it can be translated into such a Chinese version:一个人必须为早先商品供应而付的市场价格