These things last 10+ years in the cloud so you'd need to be willing to buy something truly obsolete that's already been stripped for spare parts. Also, I imagine you'd have to be willing to cart off an entire rack, which won't be a standard rack but a weird shape, and then you'll need somewhere to plug it in, which won't be a plug as such but a point to which you'd need to wire 600VAC, or whatever that cloud operator was using. Finally, you're going to need some way to connect its weird network to your plain old network.

Oh, and all the management features of the rack won't work because I am sure they would wipe their proprietary software before resale. Basically you're buying raw materials in an inconvenient package.