What is your upper limit on bucks? I don't have anything to sell, but there's a local accordion shop that has some Weltmeisters that might suffice, but they're like $600.
However, I say what I always do, hold out for a LA Handmade.
Another route would be to get one of those First Act toy accordions from Walmart or Toys 'R Us. Surprisingly good for not much dough. I even have a booklet on playing come cajun tunes on one of those that I could send you.