I haven't tried to find a cached/mirrored copy of their original sales/pricing page, but from what I remember they explicitly refused 'customer equipment', claiming security risks. The cost included a setup fee which essentially purchased you a brand new rack server already on site. I can't recall what their policy on cancellation was, but I think it was either 'we'll return the whole machine to you' or 'we'll destroy it on your behalf'.

Having new machines shipped out also seems like a better proposition from a risk perspective, since hardware isn't cheap, but it's a whole lot less than some irreplaceable customer hardware, software, or data.