Would there be a black market for bicycle parts if you could pick a bike up off the street and ride it for next to nothing? What would be the price of a nut or

Would there be a black market for bicycle parts if you could pick a bike up off the street and ride it for next to nothing? What would be the price of a nut or half a chain or a handlebar handle in a market where there are so many bicycles? Why commit a crime to purchase a bicycle, when they can apparently be shipped to your city assembled for about 50 bucks?