Venice Unleashed

Hey guys,
Can somebody tell me please what is the difference between getting the game for 30$ from the original EA shop,and getting it from a serial key website for 5$,and if somebody tried it please tell me if it's guaranteed.
And if it is...gimme some GUARANTEED serial number websites,getting this kind of entertainment where I live(I mean games) is not possible,so please don't think i'm stupid to ask this.

Thank you.
ps: I hope it's the right place to post this
Edit: sorry if this was asked before,I don't know.

Moved to Game Discussion.

Difference: EA is expensive, key is cheap
I bought a key on E-Bay for 12€.

Depends on your country. You should make sure not to get a russian key.

Ok thanks

Difference ?

The keys are the same (except for the regional differences like RU, US, EU etc..).

The only advantage you got with a retail box version: You have a disc for installation instead of downloading it for a long period of time.