[electroly]

The individual servers are not watercooled. The compute racks are air-cooled; the adjacent cooling racks then exchange that heat using the building's chilled water. It's the rack as a whole that is watercooled. If you extract a single node, you won't get any of that. As the other commenters also point out, these are blades; you can't run an individual node by itself.

[w-ll]

World of Warcraft sold decommissioned blades for about that much with no intention to be actually used. Just something to thru up in the cave.