Just like sets, each LEGO ® piece has a unique element number. For newer sets, element numbers are listed in the back of your set’s building instructions:. The number will be small, so you may need to rotate the brick under bright light to see it. The design number along with the color is a great way to identify a piece.
What does Min buy mean on BrickLink?
The seller sets a minimum buy, that means that is the least amnount you can buy. from them.