Have a chat with the computer department. See if they are going to have an magor computer purchase in the near future and ask if it would be possible if they could add in one more monitor to the deal.
When i was working on the computer commitee in high school, we did offer a simulare deal to the students / staff / parents when we were working on the 2 new computer class rooms.
But with the way things are now days (more cut throat), I can not imagine that the savings will be all that big.