You don't have to use overpay if someone offers a B.M.O.C., a B.M.O.C. is a highly traded item has a rather set value of what it could foreseeably fetch in keys. Overpay is more commonly used when calculating Unusual overpay meaning someone offered with an unusual. This is because unusuals are not commonly traded at high frequency daily and therefore it may take days to weeks to resell for a certain amount, and its unknown whether anyone is even willing to pay that amount. Therefore you may treat B.M.O.C.s at 12 keys instead of applying that massive 10% reduction in value which is even less than some quicksell buyers pay for them.

-- Baloo with 6 upcomments