I think the student versions are limited in some ways and aren't like a retail copy. May have full functions but they may expire eventually. I bought photoshop CS5 from newegg, 999.00

but the seriousness of piracy these days isn't worth it. A 100,000.00 fine and 5 years in a federal prison vs paying 999.00 If you ever spent a night in jail or any amount of time you would pay 999.00 or anything to get out. So might as well protect yourself from that by being legit and smart about it. Torrents are not safe anymore FYI