At the time of testing, no bad sectors. I will replace the drive or give the refund, if you find problems within 30 days. $7 each drive.
Seagate Barracuda 7200.10 360GB, manufactured in 2008 WD Caviar SE 400GB, manufactured in 2007 Hitachi Deskstar 500GB, manufactured in 2007 Hitachi Deskstar 500GB, manufactured in 2008