I think that car came from UK at some point.. something about it looks familar..
It is cheap if good.. but then again they are all cheap now.. if your not able to fix the problem yourself well you need to price it with someone furst, and remember, if the car is starting and not driveable that means you cant test the likes of gearbox, diff etc etc and ok to say its a head gasket but it could be a crack somewhere in block or heads, or was it drove untill it seized up with heat etc etc..
Im just saying be careful and wary, if he deals in Subarus as he says surely he could get the Head gaskets done for say 500 quid.. and then sell the car for 4-5k.
Spoiler either has brake light missing or is a copy