If you're planning to go serious into Airsoft make sure you get an AEG of a name brand preferably TM for starters. If your classmate is selling it for under $200CAD it must either be in really rough shape or that crappy Entry-Level SD6 you can purchase off of
http://www.canadianairsoft.ca just checkout the entry level guns and look for the SD6 ...if it's that and you want to play Airsoft and not just plink around. Don't buy it