I was offered a good price on ink so I bought a little extra to save a buc or two. The expiration dates on this ink range from one month from now to about six months. If I wouldn't have checked the individual cartridge dates some of these could have expired before I new it. For those with experience what would you say is generally the length of time before expiration when you buy ink? I'm trying to determine if I should have my sales rep replace these. Maybe this is why I was offered a "good deal".