Depends on class and roll
For the prices right now it seems a life is 8fg which would give around the following
~25fg for def
~15fg for atk
~7fg for spd
~7fg for dex
~7fg for wis
~10fg for vit
~150fg for life
~50fg for mana
So around 270 fg, but this is without taking acount for the class main attributes (they got different caps/limits)
I would guess it to be 250-350fg depending on class and the lvl 20 roll you get
Getting a good life roll is great and worth considering to restart a class to go for better roll.
A T12/T13 set will only cost around 24-32 fg
A top tier set can cost up to 260 fg
Hope this helps a bit, but remember these are all estimates.
If you find the prices fair i can provide you with whatever you need