It looks like the Sony Walkman Z Series has been discontinued or maybe just out of stock. When I was shopping online for Black Friday and Cyber Monday the product was on sale. A few days later it said that the product was no longer available. Im guessing that this might hint on a refresh for this model. Im guessing that they will introduce one or two new Sony Walkmans at CES 2013 or maybe even refresh the whole line of walkmans. If they don't it means that Sony has finally lost hope for the walkman line in the US market. This would mean that they stop selling the walkman line in the US but continue selling it elsewhere. I hope that they introduce new walkman devices at CES 2013 with cutting edge hardware running the latest version of Android.
Heres a link to the Sony Walkman Z Series