Goates has reason. Computers for schools have to be able to run current software or they can't be used for teaching.
His other suggestions are also on the mark.
And if you want to toss them out - bring them to me and I'll put them on our county's computer recycling pile. It is generally a large mound (maybe a hundred cubic feet) of better machines than I'm using right now. But there is a big "NO SCAVENGING" sign and eagle-eyed attendants.