[WTB] Large Capacity Hard Disk Dives

Just need something to store all my... tax documents... really though I do need some drives in the 4-6 TB range. Prefer 7200 RPM and figured some of you would have disks lying around while I could make use of them. Just let me know if you have some larger capacity drives you want to get rid of. I have room for two more drives so the bigger the better!