I am trying to find a good deal on craigslist, help

I read through this and it seemed to be a pretty legit deal for the price. Can you guys look at this system and tell me if it is a good deal or a rip off?

Thank you so much in advance  
I have been browsing these forums for about a month and I am finally going to buy a decent gaming pc soon but I will probably only have around $500 to spend on it.

http://detroit.craigslist.org/okl/sys/3361533812.html