I know this is a shot in the dark, as no one plays accordion anymore, but I'll give it a try anyway.
Here is a Made in Italy(MII

) Sonola Rivoli "Stroller" Accordion. It is full 120 bass with 2 bass settings with 1 switch and 3 treble switches plus a mute. Bellows compression is at 9/10. It was recently inspected(3 months ago) and there was no sign of mildew in the chambers or any rust(a common problem with old accordions.)
I am not sure as to what year it is, but I am guessing pre-1980. It's considered a stroller because of it's more compact size and light weight, making them pretty popular with students and buskers. It weighs in around 16 pounds I am guessing, but I can weight it if anyone is curious.
Included is a hardshell suitcase style accordion case and some old leather straps. They are worn but get the job done.
I am asking 275 plus half the actual cost of shipping in the US. Shipping elsewhere is probably going to cost roughly your soul, but I can check the cost for you.
I will try to get some pictures up if anyone is interested. Feel free to ask me any more questions and I will try my best to answer them