Refurbforless via eBay offers the refurbished HGST Ultrastar 7K3000 2TB Serial ATA 3.5" Internal Hard Drive, model no. HUA723020ALA641, for $34.99 with free shipping. That's tied with our mention from a week ago and the lowest total price we could find for a refurb by $10. It features a 64MB cache.
A 90-day warranty applies, but it's unclear who backs it.