rag-and-bone man

A rag-and-bone man collects unwanted household items and sells them to merchants. Traditionally this was a task performed on foot, with the scavenged materials (which included rags, bones and various metals) kept in a small bag slung over the shoulder.

Eventually they arrived at the first outpost of the complicated, stinking, but ultimately most profitable, wire-netting-fenced compound of Sir Harry King, sometime tosher and rag-and-bone man, now believed to be the richest man in the city.

Definition from Wikipedia