Currently, when an item is blocked for manual price entry using the "Must not key in price"-setup, there is no way to manually enter a price anymore at all. Even when the "override Price" permission is granted to e.g. a store Manager. This is a problem when the item does not have zero price allowed but also doesn't have an active sales price. In such a scenario, even the store manager cannot sell the item successfully.

This idea does request to honour the "Override price"-permission in a way, that users with that permission are still able to enter a price. Best would probably be to add a new option e.g. "Must not key in price without permission" that will enable this feature.