This cycle has brought into being a class of "second-hand sharks," people with sharp minds when it comes to shopping, who seek to profit by buying from one second-hand store and then reselling to others.
這種循環也讓所謂的「二手蟑螂」應運而生，她們憑著快、狠、準的選購眼力，在薄利銷售的二手店購買物件後，再轉賣到另一家二手店以賺取差價。