MegaMacs offers the used Apple PowerMac G5 Dual 2GHz Desktop, model no. M9455LL/A, for $259.99 plus around $40 for shipping. That's the lowest total price we could find for this configuration. (For further comparison, we saw a similar used unit with a slower processor, less memory, and a smaller hard drive for $31 less earlier today.) Features include two PowerPC 970fx G5 2GHz processors, 1GB RAM, 160GB hard drive, and DVD burner. Deal ends November 2 at 1 pm ET.

Of note, an OS is installed on this system, but it's unclear which OS. A 30-day MegaMacs warranty applies.