Is this computer decent?

[iongar]

Gateway GT5662 Refurbished Desktop PC - AMD Phenom 9500 Quad Core 2.2GHz, 3GB DDR2, 500GB SATA2 , DVDRW-Labelflash, ATI Radeon HD 2400XT, 10100 LAN, Windows Vista Home Premium RB-GA1015070R in Canada at TigerDirect.ca

Want it for casual gaming/ watching movies

the vista and cpu alone are worth more than it

 

[SapperX]

You would be hard-pressed to build a computer to match that for cheaper, however remember that a home built computer will usually have a better mobo and psu (not to mention a personally picked case). While that is an excellent price for a pre-built, it's still a pre-built and I still recommend building your own.