As the topic title states, I would like to find out what the monetary value of these emulation cartridges are, in addition to any background history. I found these at my high school (that place is a bloody museum) prior to semester 1 exams, which I completed last week. According to my principal, they were going to be thrown out, so I nabbed them.

They are designed exclusively for the HP LaserJet II & III series printers. All come with documentation, and software disks. I don't own any vintage Laserjet-series printers, so these things are completely useless to me for the time being, anyway. Pictures are provided below: