I've got a ST3000DM001 - it vibrates quite a bit. It's a lot louder than the older Barracuda XT 3TB (ST33000651AS).
Both were ripped out of retail boxed Seagate Expansion external drives (the older XT out of an Expansion 2.0, the newer DM001 out of an Expansion 3.0). Very cheap way of getting drives, and you can RMA the drives using the serial on the mechanism. The only thing to note is the firmware can be different to bare drives, but I've never had an issue with that.
Workstation: [email protected], Asus Z97I-Plus, 8GB Kingston DDR3-1600, Crucial M500 480GB, WD1003FZEX, Win7
Server: i3-4350, AsRock E3C224D2I, 16GB ECC, Intel 520 180GB, 2x Toshiba 5TB, 2xWD50EFRX, Server 2012R2, Stablebit Drivepool
HTPC1: TranquilPC ABEL H2, i3, 4GB DDR3L-12800, Crucial M4 128GB mSATA, Win7
HTPC2: Akasa Euler, DH61AG, Pentium G620, 4GB DDR3L-10666, Crucial M4 64GB mSATA, Win7