given that upgrades are free i would find it hard to believe an older version would be cheaper.
that's basically buying the latest for cheaper

Since i hav zbrush 2 is upgrading free? Other wise for me software wise it was the worst decision i ever made since i couldnt find a away 2 incoperate it into my workflow

not too aure but I bet it would be free as its a free upgrade from 3.5 and that was a free upgrade from 3, best off dropiing them a line to check.

How did you not fit it into your workflow?

i do lots of archviz i didnt see a need for it much unless trying to add folds to stuff like curtains and that was practically it. i havent done alot of organics work(other than personal work) it hasn't been very productive for me maybe someday.....