Dell has the Western Digital WD5000BEVT 500GB 2.5" Laptop Hard Drive for $80 with free shipping. Use coupon code FCZZ90DNZ2BX1N to knock it down to $72.
Specifications
- Drive Type: Laptop
- Capacity: 500GB
- Interface: SATA 2.5-in Mobile
- Interface Type: SATA
- Spindle Speed (RPM): 5400
- Buffer Memory: 8MB
- Average Seek (msec): 12
- Average Latency (msec): 5.5
- Track-to-Track Seek Time (typical read, ms): 2
- Data Transfer Rate on Serial ATA: Up to 3000 Mb/sec
- Form Factor: 2.5"
- Temperature, Operating (°C): 0 to 60
- Temperature, Nonoperating (°C): -40 to 65
Western Digital WD5000BEVT 500 GB Hard Drive: Compare Prices, View Price History and Read Reviews at NexTag
Western Digital WD5000BEVT 500GB 2.5" Laptop Hard Drive $72 + FS 
