Originally posted by GilesGuthrie
The core power required by Hard Drives is the same, no matter where they were built or where they are being run.
So the question is how is the drive that you're buying getting its power? You say you want to plug it into your USB port (also not geographically-dependent), so if the drive is taking its power from the USB port, you're all set. If the drive is getting its power from an external power supply, that's where you may have trouble.
However, you can be sneaky, and buy the drive from overseas, then contact the manufacturer's local service arm. Feed them some nonsense about dropping the power supply and can you buy a new one, and there you go!
Obviously this, together with the shipping of the drive itself, is going to cost you some cash, which you will need to factor in if you're doing a price comparison.