http://www.essentialdepot.com/servlet/the-554/Organic-Cocoa-Butter-Bar/Detail?affiliate_no=642

Discounts from Essential Depot. Use discount code “CB50” on checkout and it will cut the price in half for their 1-pound cocoa butter. It comes out to be about $3.50 per pound, plus shipping. I bought 4 and it was just over $20. Makes great soap, but it’s also edible (think white chocolate, minus the sugar and milk).

I’m sure there are better prices somewhere, probably locally, but for mail-order, this seems like a pretty good deal.