It has a case with green mold on it but other than that, it looks pretty good to me. Pearl, ivory, gold, and silver. In reality, probably not. To begin with, the materials are celluloid, more celluloid, plastic, and base metal with a chrome finish. Second, this is a very inadequate description.
Much more information is needed before even a rough estimate of the value can be reached.
Below I offer a long list of items that must be checked on an accordion before its condition can be determined. They don't make that model anymore, and I don't know how old it is or any history on it. It would cost you far more to buy a comparable new Italian made accordion with the same features than it would to fix up the old thing you dragged home from the flea market. You can't afford to pay for the repairs to the old thing you dragged home from the flea market. If you can afford the repairs, you won't be able to sell it for as much as you put into it.