The Egg has the PS3/360 versions of El Shaddai for $14.99. Both are free
ship/Shoprunner eligible.
Link: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=481 shaddai&name=ShopRunner Eligible&Order=BESTMATCH
Next lowest I found was $19.99 at Gamestop; BB still has it at $49.99