Ah, but you must include the relevant table from adamantine!
Enhancement Market Price
Item Bonus Modifier
----------- ----- ------------
Light armor +1 +2,000 gp
Medium armor +2 +5,000 gp
Heavy armor +3 +10,000 gp
Shield +1 +2,000 gp
Weapon damage 1d4 or 1d6 +1 +3,000...