手推车货郎

The first could be the case if the product you are selling to these "senior types" is quite pukka, meaning that a barrow boy isn't the right person to sell it.

如果向那些"高管"们销售的产品相当高端，那就可能属于第一种情况，就是说一个手推车货郎不合销售这种产品。