Refurbished Product Specs:

Intel Core 2 Duo
2.13 GHz
2GB RAM
80GB Hard drive
DVD/CDRW
XP Pro Installed
Keyboard & mouse
Restore CD
1 Year Warranty
PC-only $290 

Dell Optiplex 745 Towers

Machine Specs for $215 units:

Unit A:
 Pentium D
2.8GHz
1.0GB
80 GB Hard drive
CD
Win XP Pro
1 year warranty

Unit B:
 Pentium D
3.06GHz
1.0GB
40GB
DVD ROM
Win XP Pro
1 Year warranty 

Product Specs

1 x Xeon Quad Core 64 Processor, 2.8GHZ

2gb RAM

320GB Hard Drive

DVDRW

Mac OS 10.7 Lion installed

Warranty- 1 year

Product Specs:

AMD 64 x 2 2.3GHZ

2GB RAM

80GB HDD

DVD ROM

XP Professional installed

Keyboard and Mouse

1 Year Warranty 

Product Specs:

AMD 64 x 2 2.3GHZ

2GB RAM

80GB HDD

DVD ROM

Windows 7 Home Installed

Keyboard and Mouse

1 Year Warranty