Quote Originally Posted by Physic View Post
whats your op of a signifigant amount of gil? my guess is it should probably scale with level. how mnuch it should cost should probably relate to how much of your item/items are lost on failure. if you can lose everything it probably shouldnt cost an insane amount, even high level.
If we are talking about double inlaying, it should cost 10 times the amount of single inlay. But single inlay (if available) should only cost NPC retail price of the item.

A shield costs 400K gil retail.
Single materia inlay for it should cost 400K gil.
Double materia inlay should cost 4M gil.