Until there is a robust player driven economy, shops should sell crafting materials up to 700 quality. This will incentivise players to play missions that give the blueprints they want so they can make better-than-stock items without the need to mine / salvage grind if they don't want to. It also takes away some of the fear of losing a crafted item if they know then can more easily replace it.
For those that do enjoy mining and salvaging, this still gives a quality range of 701-999 to sell processed materials at a premium to those that do want to craft the top level items.

