you can ether...
(A). Get it off Ebay (most riskest way ever.)
(B). if your a student get it using student discount.
Here
(C). Pay for it up full.
(D). or dont get it, and get an older version or Elements.
my chose was (B) its the best way, but you can risk Ebay, they have versions for $100 - $200 but it might be Pirated so I would not recomend.