Yeah, SuperMicro, Tyan, and ASRock are three of the few companies I know of that sell a lot of the same stuff retail as they do to big customers.
Haha, we'll probably be getting rid of some in a couple years, actually...but only if you want to buy 10-20 racks at a time...
In the meantime, you can always rent one for $0.65/hour/GPU.