Tox1's page

@Staffan, its not cheaper than four different +1 items (12750 > 9000)its the (specific aligment/class.) that gives the item a big discount.

Then, you all should agree then that the "mage armor potion" (50gp) its the most unbalanced thing EVER, specially if you are playing a monk.

+4 AC (not just armor bonus, it doesnt have penalties and protects from incorporeals) 1/hour for 50gp. GG

oh, now that we are touching woundrous item and AC, tell me why this item is wrong:

Aura: Abrujation
Cl : 3
Slot: bracelet
Price: 1800
Weight: ?

Description:
Bracelet that casts shield on command word

Construction:
Craft Wondrous Item; shield; 900gp;
command word: Spell level x caster level x 1,800 gp
1x1x1800gp

I created that yesterday, that wasn't a very serious item but ok, let me explain myself:

1.
http://www.d20pfsrd.com/magic-items#TOC-Magic-Item-Creation

Other Considerations: Once you have a cost figure, reduce that number if either of the following conditions applies:

Item Requires Specific Class or Alignment to Use: Even more restrictive than requiring a skill, this limitation cuts the price by 30%.

2.
Ok, my bad, I misunderstood the thassilonian rune part in:
http://www.d20pfsrd.com/magic-items#TOC-Magic-Item-Creation
where it says "Creating a rune costs half the market value listed"

let me explain my chain of thoughts:
if you take an item which costs 2k, you can make the same item in a rune for 1k, all runes are non-slotted so non-slotted its included in rune price when it says so.

Its still wrong

3.
forget about the thassilonian part, lets say its a non-sloted wondrous item (earring)

shield bonus +1 2500gp (100%)
insight bonus + 1 2500gp (75%)
natural armor bonus +1 2000gp (50%)
deflection bonus +1 2000gp (50%)
--------------
6375 x2 non-slotted x0.7 specific aligment/class.
--------------
Final: 8925

BTW: its not a +4 AC, its a +1,+1,+1,+1. You all should know the big diference.

now it doesnt differ much of having a shield bracelet +1, natural armor necklace +1, ring of protection +1 and ring of insight +1 to AC.
(75gp cheaper)