Karung guni

Its practitioners are a modern form of rag and bone man that visit residences door-to-door to acquire unwanted items.

These people can be distinguished by their use of horns or (rarely) hand bell and shouts of "karang guni, poh zhua gu sa kor, pai leh-lio, dian si ki..." ("Rag and bone, newspapers and old clothes, spoilt radios, televisions" in Singaporean Hokkien) when making their rounds.

[2] Depending on the person, a nominal fee is paid for the quantity of newspapers or unwanted items sold.

The karung guni industry is made highly profitable due to the dense urban nature of Singapore, where hundreds of public housing apartment units are located in one block, with often a dozen blocks in each housing estate.

[6] Because karung guni are motivated by the resale value of these materials on the market, there are also reported cases where some collectors have been selective in what to receive from households, even though they may be still recyclable or reusable.