Bandoneon - Wanted - Bandoneon w/ Octave Tuning

Hello!
College student here, looking for a Bandoneon to study, play, love and cherish! I need Rheinische Tonlage or octave tuning, NO TREMOLO TUNING PLEASE! I don't mind if it is Peguri, Einheits, or Argentine layout or if it's AA, ELA, Gutjahr, or another modern maker, as long as it has octave tuning and a minimum of 142 tones. I am looking for a quality instrument, ready to play. Not something that will need an extensive amount of work as getting it serviced here in the US is very tricky.