There are three traveling salespersons you can meet who will offer to sell you rare items. They will greet you when you exit your farm house between 14:00 and 18:00 on non-festival, non-stormy days starting in Fall of year 2. You will meet one of the salespersons when you exit your house, then some time will pass, then you can bump into the next salesperson, wait some time, and so on. The three salespersons are Dmitri, Rainer, and Susanne. Playing the game in Seedling mode will NOT decrease the traveling salesperson's prices by 30%.