We've just been approved to sell our Dell 12th Gen (13th Gen coming soon) systems with full Dell Pro support warranty, even if we change the configuration from how we received it from Dell. Prior to this we would have to cover anything changed from the original configuration ourselves.
This should help those of you out there who are squeamish about getting a server without full manufacturers warranty. That is no longer an issue or viable excuse for why you have to purchase "new."