Looking at the hardware, I'd wag somewhere in the $2-3M range. Depends on how big of a profit margin they want to make or how scrappy they feel like being (could probably go as low as ~$1M if they can make it up in volume).

If they're following the typical 1/5x pricing model for support, that'd be roughly $500k/yr/rack. But it's also hard to do that while simultaneously describing Dell as "rapacious".