I've found that when you go direct to Dell for education equipment, they automatically assume they have a right to charge what they want.
It takes time to get a decent account manager, before we became a Dell Partner, they were always quoting us end user pricing (when we were a reseller) - eventually we got a great Account Manager and haven't looked back since!
From our perspective, its a godsend that they are awful, as it means schools approach resellers to quote for their projects!