Amulet of the Sun XP 1500
The wearer of this amulet is always surrounded by a 3' radius of natural sunlight. This sunlight has all the usual effects on undead and their ilk.
Circlet of the Magi XP 5000
This simple gold band shrinks itself to the head of the wearer. If the wearer has an intelligence of 15 or greater a small blue gem appears at the front of the circlet. When worn, all spells are treated as if they were being cast at a level higher. In addition, all spells gain a +1 to any die rolls. If the blue gem is present, the wearer gains infravision out to 60' and their AC is increased by 2 points.
This is a large blue gem (value 1000GP) with something fascinating in its centre. No-one can tell what is fascinating about it, but they all agree on the fact it is fascinating. People want to own this gem, and once possessed they are loathe to give it up. Any research performed on it will throw up many reasons for keeping it. It is not truly cursed, for there are no ill effects to owning it.
Earring of the Thief XP 2500
This adds 50% to Hear Noise rolls (or gives a base chance of 65%). If a name is concentrated on for 1 turn, the wearer can hear all that the named person hears and says for 6 + 1d6 turns.