PC Scrolls and Insignias

Scroll of Berserker's Insight (Party gains Triple XP from combat, ends if party fails to kill a foe for 30 seconds)

Scroll of Adventurer's Insight (For 10 minutes your party gains +50% XP from combat)

Infiltrator's Insignia (Assassin)
Armor +10 (vs piercing)
Armor +10 (vs physical)

Forsaken Insignia (Dervish)
Armor +10 (while not affected by an enchantment spell)

You can check these from scroll & rune traders, then sell little bit lower price than they do.