I know what I would chargeOriginally posted by Machs_FueL
possibly his sister want one (and she's hot)...
so what would you charge..?
But seriously, a quick search on ebay revealed that a PC of simular spec to what you mentioned is about $50, gamepad for $5, inverter $20. With case, connectors and the like I recon you'd be looking at arround the $100 mark.
Might be worth looking at eio for a cheap character LCD.