Western Digital WD Red WD10EFRX 1TB SATA3 Hard Drive HDD $81.37 AC @ Superbiiz.com
One coupon use per household, but if you buy more than one, you can save on shipping. Price for two is about $170 after shipping, depending on location. I just paid $257.59 for 3 drives. After e*ates cash back of 1%, it worked out to $85 per drive.
Neweggbusiness also has this drive for $89.99 after shipping with coupon code BEMCNAHE28, the next best price I've seen on this drive from a reputable seller yet.
Good review from Anandtech , one from TomsHardware , and a less detailed one from PCMag if you just want a quick synopsis.