Should I buy this computer?

I'm looking at a new computer to buy, something to have a play around with and maybe for a few games.

A work mate is selling the following for £200, i'm not sure weather its worth the money though so I am just asking for advice here as you lot obviously know a lot more then I do.

Just wondering if it would be able to run a few games normally with it being a 64 bit processor (Ie vice city, san andreas)

Also the video card is up to 300 odd mb, is this good, as its on board?

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It is an AMD Athlon 64 5000
2 GB Ram
400 GB HD
The Gfx card is inbuilt and can run as much as 384 mb I believe but takes this from the system memory
Windows XP
Dual Layer DVD rewriter
19” LG widescreen monitor
Keyboard mouse etc, etc