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Welcome!
Great to see a new budding accordionist joining the crowd.
Well, buying an accordion is a bit like buying a car
Like cars, there are many different makes, models and and condition.
Like cars, it's much better if you can give it a road test first.
Like cars, some have far more under the bonnet (hood) than others.
The assortment you have given us has some apples and some oranges, so we're not comparing like with like.
For example, you have some accordions with 120 basses and another with only 80; some with three sets of treble reeds, others with only two
Accordions of this vintage are most likely to need some servicing, some quite a lot: they aren't likely to provide " trouble free motoring " from the get go!
It's probably cheaper in the long run to pick up a few tips before spending any money than burning your fingers by rushing in.
If you live in or near a large city, the best thing would be to find a trader/dealer willing to rent your an accordion by the week to take home and get to know as a base line.
Often, the kind of music you intend to play affects the kind of accordion you need to buy.
If you know any accordionists, quiz them about their instruments and ask if can hold them and try (with their guidance) a few keys, buttons, and knobs!
Often, dealers will include your rental in the purchase price if you decide to buy.
Good luck!