I was also scammed by this guy earlier this month!
I'm happy i found this site as atleast i now have a working 2GB player.
I contacted him saying that it was only a 2GB player and not 4GB he said he didn't believe me and could i prove that it was only 2GB!
I went a little overkill and emailed him pictures of the windows format information and a picture of the Flash Ram chip (with the serial number clearly visible) and gave him the link to Samsung's web page which can decipher the chip code to show what it is, then gave him a full breakdown of what the code meant and how that proved it was a 2GB chip!
He then just emailed back saying that he didn't understand my email but would be prepared to offer a full refund if i posted it back or a partial refund.
Clearly i wasn't going to mail it back (and it does work fairly well as a 2GB player) so i asked for the partial refund option.
Just to get things in perspective the player cost me just over £21 inc. postage and he just came back offering me a £1 partial refund!?!?!
Needless to say i emailed him back asking him to revise his 'offer'
Am waiting to see what he has to say next!