$400? What hardware spec?
Newegg.com - ASUS Eee PC 901 XP - Pearl White NetBook Intel Atom 8.9" Wide SVGA 1GB Memory 12GB SSD Integrated Graphics - Netbooks
It have WIFI N, built-in webcam, battery life for 7.8 hours,multi-touchpad, bluetooth 2.0, Windows XP, etc.. for only $280