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Amazon.com has the Apple Mac mini MB138LL/A (1.83 GHz Intel Core 2 Duo, 1 GB RAM, 80 GB Hard Drive, Combo Drive) for $570 after $25 rebate (Exp 1/28/08).
Final Price for this deal: $595 - $25 = $570 + Free Shipping

Description:
* 1.83 GHz Intel Core 2 Duo processor with 667 MHz system bus
* 1 GB DDR2 SDRAM (expandable to 2 GB), 80 GB SATA hard drive, and slot-loading slot-loading Combo drive (DVD-ROM/CD-RW)
* One FireWire 400 port (8 watts); four USB 2.0 ports (up to 480 Mbps); DVI output; VGA output (using included adapter); S-video and composite video output
* Built-in 10/100/1000BASE-T (Gigabit), built-in AirPort Extreme Wi-Fi (802.11g)3; built-in Bluetooth 2.0+EDR (Enhanced Data Rate) module
* Mac OS X v10.4 Tiger, iLife '08, and Front Row software included