JohnRoy - 6:56 pm on May 26, 2010 (gmt 0)
Me? Just kill it. Time to move on to other products. That's where the money resides.
That's if your page got hits only with paid ads.
If you relied on search engines, killing the page is like purchasing the ticket, rushing to airport, boarding flight, fasten seatbelt, and get ready for.. uh, flight suspended.
As others here said, notify visitor item is discontinued but offer something else or let them just signup to your email list :)