Well guys, id love to see you build a $250 portable. I'd laugh. No, seriously. $700 is the highest im going to go because i know it's expensive, but think of all the work im doing FOR him. Also, im giving him what he wants! He just specifies what he would like on it and so on and so on and i get it and make it. Ok, here's how i calculated $700.
Battery: $100 [min]
Screen: $40 [or if he supplies it I'll take off $40]
ModChip: $50 [min]
PSTwo: $100 [min]
Supplies: $50 [min]
Design/Labor: $200 [min]
As you can see I'm not just going to buy a battery that will last 30mins or a 23rd party screen and a cheap ass modchip or a PStwo that has pubic hair on the heatsink material.

This is all minimums and im compensating for the price of more expensive yet high quality items. I get most of the stuff on eBay, and not even calculating shipping costs into this, but that will come off of the profit are to provide a kick-ass PSTwoSP.
PS2M-99% -Final Stages of the 1st O.G. PS2 Portable (Will this ever get done??)
PSTwoSP- 50%
Rewiring Controller, LED Modding Screen