I bet that this violates the agreements most employees sign for discounts, which probably says they can only buy for themselves (or maybe family/friends), and that they can't resell the items. So this is fraud, basically.
Perhaps I'll start a site called "EmployeeOfficeSupplies.com" that hooks up people in need of office supplies with people working in offices who are happy to steal them. Or maybe one where I help people "share" their health insurance benefits.
This is stupid.