Blizz and Amazon sell it for $9.99 w/o s&h. Chips'n'Bits is $12.99.
But isn't this something you could've found for yourself? The laziness these days. Tsk, tsk, tsk.
You can also find it on the shelves of most stores. I've seen it at Office Depots, Toys 'R Us's, Gamestops, and Wal-Marts. You should be able to find it no problem. And $9.99 is pretty damn cheap for a game with such great replay value.