Sony has sold just 17,618 PSP Go handhelds in Japan over the past three months, German magazine GameFront and Japanese analyst firm Media Create this week. The Go was not only the poorest-selling model over the period but has seen its sales taper to below levels reserved for previous-generation consoles. At 1,275 units sold in the first week of March, the "premium" PSP has been outsold by the now decade-old PS2.