$149's possible but I say it'll be $179 for the US launch
http://money.cnn.com/2004/10/27/commentary/game_over/column_gaming/index.htm
Regardless of whether the PSP makes its U.S. launch date, the system will arrive with momentum on its side. Traditionally, when Sony has launched hardware in Japan, it offers a moderate price reduction when it brings the device overseas. When the PlayStation 2 launched in Japan, for example, it carried a price tag equivalent to $360-$370. When the PS2 hit U.S. shores seven months later, it sold for $299.
So, could Sony plan to launch the PSP in North America for as low as $150? It's certainly possible – especially if the system does get delayed. If it does launch for under $150, expect the gaming world to go into a feeding frenzy.
http://money.cnn.com/2004/10/27/commentary/game_over/column_gaming/index.htm