Buy.com offers the ioSafe Solo 500GB USB 2.0 External Hard Drive
, model no. SL0500GBUSB20, for $99.24
with free shipping
. That's $0.19/GB and the lowest total price we could find by $30. This drive runs at 7200 RPM and claims to be disaster-proof against fire or flood. A 3-year ioSafe warranty applies. In addition, it features one year of Data Recovery Service and includes up to $1,000 for forensic data recovery.