Currently Being ModeratedOct 18, 2012 1:18 PM (in response to keagan1234)
I work for an educational institution. We're enrolled in the education VPP program. We find that most app developers offer a 50% discount when buying 20 licenses or more in a single transaction from the VPP Store (different from the usual App Store). So we typically buy apps in quantities of 20 licenses (or more) at a time even if all 20 aren't needed. For example, if a teacher requests 15 copies of an app that costs $9.99 each, you could order 15 copies for $149.85 or order 20 copies for $99.90. You actually save when buying 20. So we buy the 20, give the teacher 15, and keep the extra 5 licesnes and dish them out to other staff/students as needed.
Hope this answers your question!