Greatpumpkinator is correct about the resources that need skill to gather (ingots, wood, leather), they are harder to come by in bulk.
However, this should not discourage you fro scrolls and reagents. Those resources only require you to go from shop to shop. Any Mage NPC should sell you scrolls and reagents. Any Scribe NPC should sell you scrolls. Their locations have not changed. I supply you with a rune book to several mage shops, if you would like (reply here).
Stayin Alive,
BG