i love how much hp overcharges for their computers.
quad: 210$ retail, you can find them for as cheap as 190 if you don't get the new g0 stepping model...since most people don't even know what that means and as such will never notice the difference
ram: going expensive, about 60$ for ocz plat
hd dvd: they were on sale for like 10 bucks a while back, but who'd even want one? call it 50 bucks on ebay.
burner: 30$~
hd's: no one sells 360g drives, so two 500g drives is like 180 max.
vista: 90$
8500gt: a good one is like 70 bucks, but you can get them for as low as 45$. we'll call it 70, although you can get a good 8600gt for the same price and actually play modern games with it.
motherboard: a way better mobo than you'll get is like 100$ (asus p5n-e). the ones that hp puts in their computers are like 40 bucks if you actually purchased one like it. assuming it's the one i think it is, you can actually buy one for around 42$ through geeks.com, as of a month or two ago.
cheap case w/ bad psu like in the picture: 50$ or so.
hp media center remote: they couldn't pay me to use their crap, hp's optical stuff is worse than trash. never works from more than a foot or two away. it's not even a standard transmitter, it's infrared - and it's about as powerful as the old infrared transmitters on laptops.
total: w/ a better mobo by far, more hd space, better components as a whole, it's not quite 825$ not counting shipping.
kill the hd drive, spend some money on a graphics card, go with better ram, don't get a quad unless you are doing heavy video rendering with multithreading-optimized applications. still a rip, considering this is a used computer that's been 'recertified'.