Beware of buying miners from others. I have a half working single that I bought from a friend and BFL is being iffy about it. Got a email from support saying that they don't show me ordering any singles from them. I explained that I got it from a friend and got the same response. No record of any singles, just little singles. So beware even though I remember this post..https://bitcointalk.org/index.php?topic=115597.msg1248646#msg1248646