Yup I bought the 4" 3/4 fans from the same ebayer. Great fans work well not too loud, just plug and play. great service too.
Keep it simple stupid and that's what I did....... well at least with the fans.
can't go wrong with these guys. I went to radio shack and it would have cost me double to get one fan ( and it didn't come with anything ) than it would have to get 2 fans and the ac adapter and cable etc from this ebayer.
Good deal IMO.