Buy.com has the Cavalry 1TB external hard drive (model no. CAUM3701T0-OTB) for $104.99, which is on par with the current list price, however this $25 mail in rebate drops the price down to $79.99, making this the lowest price we could find on this hard drive by the same price margin.  FREE shipping is included and sales tax applies for residents of New York and California. 

The Cavalry 1TB drive appears to be a good standard issue drive that doesn't have any major flaws according to reviews at Newegg.  For just a bit more NextWarehouse.com has the stylish LaCie 1TB hard disk, designed by Neil Poulton, for $101.83 with FREE shipping.  Samsung's Spinpoint F2EG 1.5TB SATA hard drive is a great choice for anyone who is looking to maximize their storage capacity, while minimizing cost being priced at only $97.99 with FREE shipping.  The WD 1.5TB Caviar Green drive is another great choice, priced at $119.99 with $1.99 for shipping, it also comes with the added bonus of energy savings all year.  The last two drives mentioned are internal hard drives, but it is possible to use them externally with a device like the Thermaltake BlacX eSATA hard disk drive USB dock, now priced at $46.06 with FREE shipping at NextWarehouse.com.