[Cheapest Funtional System] Trying to Build a Decent System

Hey everyone. Just joined the forums in search for some help. I need to build a somewhat decent computer, capable of running World of Warcraft on all low settings at a fair frame rate. Doesn't have to be amazing, just need to get by.
I've looked on new egg for parts, I'm just not sure what would be the cheapest configuration. If you could, please help me out by listing all the components I'd need. I'm really new at this, and any help is greatly appriciated.
Thanks guys!

Running WoW at low settings and a decent frame rate can be achieved by a $300 computer w/ integrated graphics. Is there anything else that you need the computer to do?

Right Now i'm running the following...

MoBo: BIOSTAR TP35D2-A7 SE $79.95

Memory: G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory $34.99

CPU: Intel Core 2 Duo E8400 (stock) $164.99

Video: MSI R4850-T2D512 Radeon HD 4850 512MB 256-bit GDDR3 PCI -Express 2.0 x16 HDCP Ready CrossFire Supported Video Card $167.99

Case: XION Solaris XON-403 Black with Green LED Light Steel ATX Mid Tower Computer Case $39.99

Power Supply: XION XON-630P12N 630W ATX12V SLI Ready CrossFire Ready Power Supply $59.99

Hard Drive: Seagate Barracuda ES.2 ST3250310NS 250GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive $79.99

Fan/Heatsink: ARCTIC COOLING Freezer 7 Pro 92mm CPU Cooler $26.99

DVD: LG Black 20X DVD+R 8X DVD+RW 16X DVD+R DL 20X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA 20X DVD±R DVD Burner w/ SecurDisc Tech $23.99

Grand Total... $678.87



What i had in there before were 2 things different (listed below)... so minus the E8400 and 4850, it'll cost about $400.00 total and that will run WOW just fine, i had a stable 45 FPS minimum with highest settings with the P4 and X1300. I get 100+ at ALL times with the new E8400 and 4850.

Video: VisionTek VTKX1300256SFF Radeon X1300 256MB 128-bit GDDR2 PCI Express x16 Low Profile Ready Video Card $FREE off friend though you can buy one of these on ebay for like nothing

CPU: Intel P4 (LGA 775) 3.0 630 $FREE off friend though you can buy one of these on ebay for nothing

My bottom-dollar AMD build would be suitable for the stated application(s); actually would do better than required. You could shave it down a little more by using Biostar's cheapest 790GX board for $99. This doesn't include the OS, keyboard, monitor, or rodent.

A-DATA 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model ADQVE1A16K - Retail
Model #:ADQVE1A16K
Item #:N82E16820211066

$28.99 $28.99

Rosewill R218-P-BK Black 0.5mm SECC Steel ATX Mid Tower Computer Case - Retail
Model #:R218-P-BK
Item #:N82E16811147073

$29.99 -$8.00 Instant $21.99

GIGABYTE GA-MA790GP-DS4H AM2+/AM2 AMD 790GX HDMI ATX AMD Motherboard - Retail
Model #:GA-MA790GP-DS4H
Item #:N82E16813128352

$138.99 $138.99

Antec Basiq BP500UB 500W ATX12V Version 2.01 Active PFC Power Supply - OEM
Model #:BP500UB
Item #:N82E16817371019

$39.99 $39.99

AMD Athlon 64 X2 5000+ Brisbane 2.6GHz Socket AM2 65W Dual-Core Processor Model ADO5000DOBOX - Retail
Model #:ADO5000DOBOX
Item #:N82E16819103211

$59.00 $59.00

Seagate Barracuda 7200.10 ST3250410AS 250GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
Model #:ST3250410AS
Item #:N82E16822148262

$54.99 $54.99

LITE-ON 20X DVD±R DVD Burner with LightScribe Black SATA Model iHAS220-08 - Retail
Model #:iHAS220-08
Item #:N82E16827106265

$29.99 $29.99

Subtotal: $373.94

So I found this case: http://www.partspc.com/ProductDeta [...] odID=11277

I'm just wondering if this mobo will fit in it, to avoid any complications: http://www.ewiz.com/detail.php?p=MB-TA790GX&c=pw

I'm building it from scratch, this is the first computer I've ever built and don't know exactly what I'm doing. Any additional cables/screws you could list would be amazing

Thanks again guys!