TimezAttack/BigBrainz/ImagineMaths Site License Costs

[LeMarchand]

I installed the free version of TimezAttack many moons ago, and it's now starting to be used (yay!) - so much so that there is talk of paying for the full version. However, it looks like Timez Attack got bought out by Big Brainz who are now part of Imagine Learning, but they seem to be a bit coy as to cost. Has anyone got any idea of the cost for a site license for for around 400 junior school kids?