Albert Barnes on Revelation 18:11

And the merchants of the earth. Who have been accustomed to traffic with her, and who have been enriched by the traffic. The image is that of a rich and splendid city. Of course, such a city depends much on its merchandise; and when it declines and falls, many who had been accustomed to deal with it as merchants or traffickers are affected by it, and have occasion to lament its fall.

Shall weep and mourn over her; for no man buyeth their merchandise any more. The merchandise which they were accustomed to take to the city, and by the sale of which they lived. The enumeration of the articles of merchandise which follows, seems to have been inserted for the purpose of filling out the representation of what is usually found in such a city, and to show the desolation which would occur when this traffic was suspended.

(c) "merchants" Eze 27:27-36