rachel123 - 2:42 pm on May 15, 2010 (gmt 0)
Keep the page alive for search engine benefit, but exclude it from your website's search results. In other words, let Google etc.. find it, but make it impossible to find on your website.
So people do this deliberately? As a shopper, it's one of the most annoying, off-putting things to click on a SERP for a specific product and then not be able to find it. Believe it's against Google's Webmaster guidelines as well - what do you do with that inbound non-robot traffic that clicks on that SERP? Redirect it somewhere else?