只要有人喜欢他的货品，他就会卖给他

我觉得作者省略了两个字“只要”。 因为他讲义气，认朋友，满腔热血，（只要）是识货的（人)，他都卖。 因为根据这句话的意思，“是识货的”应该是条件状语，省略了“只要"。

就我个人的理解，“是识货的，他都卖”这句话字面上的意思是：（他遇到的人）是识货的（人），（如果那个人想买他的货），他（愿意把货）都卖（给那个人）。 假设米盖是一个生意人，如果米盖遇到一个客户，并且这个客户对米盖的货物很欣赏，如果客户愿意买米盖的货物，那么米盖愿意把货物全部卖给那个客户。 这句话真正的意思是：如果有人知道米盖的优点，并且对米盖好，那么米盖也会对那个人好。

卖: that the sale 是识货的: Describes the value of the goods themselves have hidden 是识货的，: added a ","as a premise description, sub-sentence to describe the meaning of play 是识货的，他就卖: the conventional interpretation of the phrase in Chinese, that is, the goods when someone like him, he will sell it to the person At the same time, these words represent different scenes in different meanings This sentence can be used in exclamatory tone appeared on behalf of the people of the traders and buyers the ability to appreciate the understanding of the value of goods. Can also be introduced to others when to use, on behalf of the businessmen who buy a certain evaluation criteria At this point, can be understood as, the buyer can not be recognized if the value of the goods will not be recognized by businessmen, will not have the opportunity to buy goods

The meaning of '是识货的' is a Chinese phrase that describes anyone who know the value of the goods assuredly.In other words,米盖 will sell the goods to them when some people think the goods were really worth buying.'Cause they are worth it indeed.