Is this a bargain for £500?

[SexyGreyFox]

My mate has hit hard times and needs money.
He's offered me his new PC for what looks like a bargain and I just so happen to be in the market for building a new one anyway.
If I buy it I'll feel so guilty because it will be the first computer since 1988 that I haven't built myself and I'll feel guilty not buying from OCUK (I send everybody else there though).
I'm not an overclocker and I don't play games but I would like a performance boost over my P4 3.6 system.
I've obviously been adding items into the OCUK basket and I can't get anywhere near the price.

C2D E6600
2GB DDR2 RAM
400GB WD HD
NEC DVD Rewriter
nVidia GeForce 7600LE
Built in TV Tuner
Wireless Keyboard + Mouse
15 in 1 Reader
Vista Premium (legit)

What do you think?

 

[SexyGreyFox]

does it matter if you're over paying? he's a friend, help him out a bit

if I don't take his offer others will.

Since I will NEVER overclock or play games on it I was wondering whether it will be a good performance boost over my P4 3.6 or shall I wait and build my own Quad Core system in a months time (when processor prices come down)?