Russ, The problem you're encountering isn't an error in math, it's an error in understanding. You're misunderstanding is common becayse Ebay words thier rules rather crappily. You are charged 5% of all sales up to $25 PLUS an additional 2.5% for $25 to $1000. So using the printer that sold for $41, you get charged 5% for the first $25 (1.25) then 2.5% for the additional $16 (.40) for a total of $1.65. I know, it's a weird system :) Tony