atari system: $25.00
hip screen pad: $30.00
nes controller (what i would use) : $3.00
battery holder: $6.00
on/off button: $3.00
easy/hard button: $3.00
and for the case use radio shack project box: $3.00
or use the system case cut it apart into a rectangle
it would be like $70.00
(making your own portable for less money priceless)
