Depends how you got there... When I bought esprit 5 it was more than the current $199 and then bought all the modules separately...

Vue 5 esprit = 250
Lightune = 40
Upgrade to esprit 6 = 80
Deep Access = 40
Botanica = 40
Ecosystems = 100
HyperVue = 40 (Final plugin changed status to Pro Studio)
Upgrade to 6 Infinite = 300
Sidegrade to Complete = 100

Total = $990

So to get back to Infinite from here would mean a total paid of almost $1500 for a $900 piece of software.