Spec Check on Used Desktop

[Learning]

I'm thinking about buying this from a money-hungry college kid at the end of my hall. I'm a CS major just looking for a second opinion on the rig.

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Case: NZXT Apollo ORANGE NP Orange SECC Steel Chassis ATX Mid Tower

Power Supply: HIPRO TOP-500P5 ATX V2.01 500W

Motherboard: ABIT AT8 32X 939 ATI CrossFire Radeon Xpress 3200 ATX AMD

CPU: AMD Athlon 64 X2 4400+ Toledo 2.2GHz Socket 939 Processor Duel-Core
NOTE: CPU overclocked to 2.4GHz

Video Card: ATI Radeon X1900XTX 512MB 256-bit GDDR3 PCI Express x16

RAM: CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit

Hard Drive: Seagate Barracuda 7200.10 ST3320620AS (Perpendicular Recording Technology) 320GB 7200 RPM SATA 3.0Gb/s

Drive #1: BenQ 16X DVD Burner With 5X DVD-RAM Write Black

Drive #2: LG Combo Drive Black


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I can get it for $650. Is this a really good deal or am I missing something?