Nice car and really for 12g's and the mods he has done 12 isnt too far off. I would through out a high 10 number and see if he goes for it. If not then I wouldnt pay no more than 11500 for it. One of the nicer, cleaner non riced out Focus's I have seen. I think he is a member over at focaljet.com. Pretty cool website if you like focus's. Might want to check it out sometime. I have an 06 Focus ST which is the car they discontinued the SVT for. The SVT's if I am not mistaken are 180 something hp from the factory and you can mod the shit out of them. Funny thing is my ST which is a 2.3l 151 hp from the factory is just as fast because of the torque in it. Plus I can mod it even more than the SVT. I havent went haywire yet, just some mild mods like intake, exhaust and some other very little things. I beat my 02 GTS Eclispe everytime light to light. Thinking if I still have my GTS this summer, I am taking it up to the track and either having my dad or my friend race me in the quarter to see how I would stack up to it. Right now, I am in the high 14's with it and want to get to low 12's maybe this next summer. Baby on way though, so might not be able to.
Might want to check into the ST's. Brand new they are right around 17500 and have a few different packages out there. I mean for 12 you be getting a sweet SVT which they stoped making them. But with the ST you would be getting a warranty. Then again if you want to mod the shit out of it, you may lose your warranty and would just be better to get the SVT. Good luck!