Some types of magic item are more common than others: scrolls on which simple spells are written that crumble to dust upon being read aloud; stones that contain magical power which can be cracked open to aid a Wizard's conjuration; even humble shields that bear runes of protection.
Any magic item marked with an asterisk (*) is considered to be extremely common. Such items are seen in great number and, as such, can be purchased alongside other magic items from the same category. In addition, there is no limit to how many duplicates of such items can be included in an army, or even how many duplicates a character can carry (beyond the limit of how many points that character can spend on magic items).