Western Digital Caviar Green 1TB 32MB Cache SATA Internal Hard Drive for $69.99 shipped after code ZZF8810 and this $15 rebate. (Make sure there is no extra space before and after the code). Here is a screenshot before the rebate for your reference. Note that this drive comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical. This is part of Western Digital’s GreenPower lineup, which reduces the power consumption. Most places have it for about $84.
Originally posted earlier, this post has been revised and this is just a friendly reminder.