im a proud owner of a alfa 156 v6 monza version with red monza leather interior, 18inch original italian alloys, ive re-programmed the ECu and have fitted an aftermarket exhaust. I was warned by many 'pundits' that alfa's are a problem child, but the bottom line is if you take good care of it, it will last u awhile.
as for resale value goes, well why would u want 2 sell such a car anyway?