One of my players was asking about this.
Gloves of elvenkind grant a +5 compenetence bonus to concentration. It costs 7500 gp.
Spellguard bracers grant a +2 bonus to concentration, that seems to be untyped. It also grants a once a day reroll of a concentration check. It costs 5000 gp.
So normally you would assume they would stack.
There are two other items that grant a +2 untyped bonus to concentration:
The ring of arcane mastery grants a variety of effects and costs 20,000. I'll ignore that for now.
The tunic of careful casting grants a +2 untyped bonus and no other abilities, and it costs 5000 gp, the same as the spellguard bracers.
The fact that the spellguard bracers and the tunic of careful casting cost the same but the bracers do more makes me thing that the bracers should not be untyped. I'm also not sure whether the character in question intends to try to get all of these items for a total bonus of +11 to concentration checks.
What do people think?
Peet
Spellguard bracers only work when casting defensively, where the tunic works on all concentration checks. So the bracers getting an extra power for the same price is fine.
Thanks!