We've been told by many schools that they get their budgets year on year, so the cheaper the better. Doing this allows us to give massive discounts to schools and help keep that yearly budget down - as they've requested.
If there was to be a single purchase, then it would be significantly more than it is now, which again isn't what the majority of the schools want. They've told us they need to squeeze as much as they can from their yearly budget.
If students require 1.x then it's currently included with GMS2.
If you need help with pricing, then contact the helpdesk.