Newegg has the Western Digital Caviar Blue WD6400AAKS 640GB 7200RPM 16MB Cache SATA Hard Drive for $70 with free shipping. Use coupon code EMCLWNW27 to knock $10 off.
Specs:
* Brand Name: Western Digital
* Model: WD6400AAKS
* Hard Disk Size: 640 GB
* Warranty: 3 years warranty
* Hardware Platform: PC
* Hard Disk Description: Internal hard drive
* Form Factor: 3.5" x 1/3H
* Hard Disk Interface: Serial ATA
* Hard Disk Rotational Speed: 7200
* Buffer Size: 16 MB
* Width: 4 inches
* Depth: 5.8 inches
* Height: 1 inches
* Weight: 1.4 pounds
Newegg.com - Western Digital Caviar Blue WD6400AAKS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - Internal Hard Drives
Western Digital Caviar Blue WD6400AAKS 640GB 7200RPM 16MB Cache Hard Drive $60 + FS 
