Fuji S2, S3 or S5 PRO?? Assistance Needed!

Hi guys,

i am looking into buying the S5 PRO, but i just found that a friend of mine is selling a S2 and S3, and i don't know ANYTHING about the S2 or S3.

All i know is that the S5 PRO is really really good for portraits/skin tones. Do any of you know the differences and which of these three would be the best?  And by the way, can i use ALL of my Nikon lenses on ANY of the three???

The S2 has around 60K actuations for $150 dollalrs.

The S3 has around 20K actuations for $200 dollars.

The S5 PRO i could get it for around $400 dollars with around 20K actuations or less.