how much are my printing cartridges worth?
my school just gave me 12 unopened/unused okidata printring cartridges and im trying to figure out how much they are worth. theres about 12 of them and this is what it says on the boxes, “okidata ribbon” “for use with the following Okidata printers:320/321
and all 100 series 9-pin printers.” [...]