As stated in the subject, i've got nine Seagate Constellation ES.2 ST33000650NS 3 TB drives for sale.

Power-on hours for half of the drives is 4331 hours / 24 = 180 days. Power-on hours for the other half of the drives is 7876 hours / 24 = 328 days.

Asking $160 plus shipping each, buy all nine and i'll ship them for free within the United States. Willing to do shipping via USPS or UPS, your choice. Cheapest I could find these for new was $244, and used on eBay was $195. Get an enterprise hard drive for the same price as a desktop drive.