Those wheels are from '09 WRX, that makes this car impossible to be STi unless they changed rotors etc or unless this car is '04
Seats looks like they're from bugeye.
Then you look at quarter panels (particularly fender flare), those are from '05+ STi.
Someone with carfax or extra few bucks should run a carfax through this service: http://reportswap.com/
I've used them on more than one occasion, really good deal.