One of the best inventions ever!
Amazon has the All Ware Pineapple Stainless Steel Corer/Slicer for $3.81 with FREE shipping.
Seriously, best deal. Love not having to mess with cutting pineapple anymore (and love being able to have it in my smoothies.)
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.