Magic Item Creation Cost Question

[Tetsubo]

How much would a magic item cost that granted a templates abilities? Or how much would the XP
cost of such a magic ritual be? Example, a mage wants to "buy" an Aquatic template for himself. Would an item that granted such a transformation (i.e., a permanent change) be priced differently than an item that only granted the template while worn/used?

 

[kreynolds]

For a starting point, you should check out the Prestige Races article in Dragon Magazine, or you could use Bastion's method here.