mwave offers the refurbished Western Digital 320GB My Passport Essential Portable 2.5" USB 2.0 External Hard Drive
in Charcoal, model no. WDBAAB3200ACH-NESN, for $39.99
with free shipping
($0.12/GB). That's $5 under our May mention and the lowest total price we could find by $10. This external hard drive runs at 5400 rpm and has a 2MB cache.
A 180-day warranty applies, although it's unclear who backs it.