Precision Building: The Art and Strategy of Buying LEGO Bricks by Number
Several primary channels cater to those looking to purchase specific pieces based on these IDs: LEGO® Pick a Brick | Official LEGO® Shop US buy lego bricks by number
MINI LOWER PART, NO. 2857. (1) ID: 112475. $0.70. MINI LOWER PART, NO. 2854. (1) ID: 112478. $0.70. MINI LOWER PART, NO. 2856. (1) BrickLink - Buy and sell LEGO Parts, Sets and Minifigures Precision Building: The Art and Strategy of Buying