Not that itatters anymore :-( but here is what the srd say about wondrous items:  Creating Wondrous Items<br/><br/>To create a wondrous item, a character usually needs some sort of equipment or tools to work on the item. She also needs a supply of materials, the most obvious being the item itself or the pieces of the item to be assembled. The cost for the materials is subsumed in the cost for creating the item. Wondrous item costs are difficult to determine. Refer to Table: Estimating Magic Item Gold Piece Values and use the item prices in the item descriptions as a guideline. Creating an item costs half the market value listed.<br/><br/>If spells are involved in the prerequisites for making the item, the creator must have prepared the spells to be cast (or must know the spells, in the case of a sorcerer or bard) but need not provide any material components or focuses the spells require. The act of working on the item triggers the prepared spells, making them unavailable for casting during each day of the item's creation. (That is, those spell slots are expended from the caster's currently prepared spells, just as if they had been cast.)<br/><br/>Creating some items may entail other prerequisites beyond or other than spellcasting. See the individual descriptions for details.<br/><br/>Time Required Crafting a wondrous item requires 1 day for each 1,000 gp of the base price.<br/><br/>Feat(s) Required: Craft Wondrous Item.<br/><br/>Skill(s) Required: Spellcraft or an applicable Craft or Profession skill check.