I wouldn't buy second hand or refurbished HDD's. They don't have great life to begin with because of all their moving parts.
Originally posted by FlyingIrishMan
Second hand or refurbished.
Honestly your best shot is just to catch a deal or a sale or something, I personally won't recommend second hand HDD's unless you are really striped for cash.
Most HDD's now on Tiger Direct are still at a relatively cheap price, you can check them out if you'd like.