I have a Steripen Classic that is essentially new. I picked it up at a store that gets returned merchandise from a major retailer. I've satisfied my curiosity after making the thing glow in a glass of water 4 times, but I don't think it's for me. This isn't the model that comes with the prefilter. It's still in the box.
http://www.steripen.com/steripen_products.html#classic
$45 shipped.