Fabrizio D'Alisera baritone trio. Conn12m+vintage Otto Link

Sounds good.

I've been playing the same 12M as my main saxophone since 1984 (38 years, same horn), and the same Meyer mouthpiece since 2006 (16 years, same mouthpiece).

My second instrument is alto: same Conn 6M since 1978 (44 years, one horn) and Meyer mouthpiece since 2000 (22 years, same mouthpiece).

I think there's a lot to be said for just getting to know the instrument you have, rather than constantly chasing after something different. I've been married 32 years, too. My two professional day jobs to date are 20 years and 16 years (and continuing) in duration.

I'd say a silver plate 12M with rolled tone holes and the front F ought to bring about $4000 in the US, which right now is about E4000.

Personally I wouldn't want to play baritone without having the front F. It came rather late to the Conn baritones, maybe about 1935 or so. The key can be added if you can find a tech who's willing to do it.