Want reasonably priced jon boat - N.A. - (Swoyersville, PA)

I live just outside Wilkes-Barre. I want to buy a jon boat in reasonably good condition, and at a reasonably good price. Since you can buy a new one at Walmart for $599 I'd want to pay no more than half that price and, if it's in only reasonable -- not great -- shape, less than that.