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*When looking at the sale prices of used pinball machines, the median is often more useful than the mean because one unusually high or low sale can heavily affect the average. For example, if most machines sell for around $6,000 but one rare collector’s machine sells for $20,000, the mean price may suggest that typical machines are worth much more than they really are. The median shows the middle sale price, making it a better representation of what most buyers and sellers can realistically expect. This helps create a more accurate and stable price guide.