I set 5 so as not to offend the hardworking sellers, they will prompt and treat me politely. But, probably, there is no need for such previously necessary kiosks. Tickets are now electronic, and unfortunately there are fewer and fewer fans of reading a magazine or newspaper in public transport.
A very rude salesman. That you will never ask. He does not order tickets for travel . Previously, such girls worked, they were polite, they always smiled, you would never hear a rude word.