Payed 300 for my Athlon XP2600, + 512Mb Ram + case & 350W powersupply; later upgraded with a Radeon 9500 card for an additional 275.
Only later I upgraded to 1GB RAM DDR2 (80).
During the course of a year I spend about $600 on harddrives, especially those of Maxtor seemed to crash in my case, mostly because of the heat inside the box.
That's where I opened my case and altered the cooling.
Air was sucked in from the drive bay, passed the HD's, to the CPU.
from the bottom air passed the graphics card to the CPU, where it was sucked out by the powersupply,and ejected upward.
My computers before that where given by my dad.
Later I bought my first $800 Sony Vaio. It supposed to be a VGN-C140G, on 60% off, but they shipped me a VGN-C190G. I did not complain,and the newer type was slightly better!
It did have a slight discoloration in the screen though.
My girl bought her laptop $1000,Sony Vaio, next gen. of mine. Both where C2duo's with 2Gig ram.
hers 2Ghz, mine 1,6Ghz.
She also has a 200Gig HD, while I only have a 120Gig HD.
The monster has held strong for over 3 years now.
I also bought an Acer EeePc 701 for 275 (+25 customs/import taxes).
So it's pretty hard to say how much I bought my pc's; since most of the time I'd be upgrading my older gear.
At this moment I only own my Vaio laptop. When finances go better, we might buy ourselves a Phenom II desktop, depending on what is cheaper, I might build it from parts; to play some older games on (in the likes of wow).
The specifications might differ with time, but if I'd be buying a new PC, it'd be a Phenom 2, with 4Gig Ram, Win7, and a radeon 4770,4670, or 4850.
I'm also thinking about an atom platform as hardware router and fileserver. It's good on electricity, can download bittorrent with ease, and rout external HD's to my wireless router.
That should costme no more than $300 to $500 for perhaps the ion platform.
The ion platform will (hopefully) perform better than my Sony Vaio laptop to game on.
With a lower cpu, but better graphics card...