Here.
https://www.woot.com/category/comput..._cnt_cdet_pc_4
I know amazon bought Woot a while back, so I think there's a good chance many of these would be on amazon warehouse too?
Just for anyone who wants an older cheaper one.
Like the kindle keyboard with 3g, $14.99, that's a heck of a price, just for the battery if you need one!