Well, you're really not giving us enough info. It would also help to know what mods he did, particularly what he did to get the 200hp. I also hope he has a dynosheet to prove he does indeed make the power he claims.
That aside, I think it's a pretty meticulous looking hatch for $6k. Apart from the cheesy 'R' decal on the side and the ricey dual exhaust system, the car looks great. The paint job looks very nice, and the ground effects are tastefully done. His car would easily be worth US$4,500 from exterior mods alone.
Another thing I'd advise you to do is to at least check out the car in person, to be sure you know what you're getting. Take a test drive and do a compression check. I don't know which city you guys are in, but I don't think it's too far of a drive from Sweden to Germany (12hrs?).
Ask for more info. If it looks good, drive out there to check it out.