This is true but not all sellers are nice.
Not long ago i was buying a lens and being a buyer, i agreed to meet up with the seller near his place, i took 1 hour to travel from my place to his place. Met up and tested the lens on the spot, after testing for like 10 minutes, i said i am not going to buy his lens as the condition it is not as what he has advertised and the performance is not to what i had expected from the price which he is selling the lens. After i rejected him and start to pack up my things, he started to scold me, saying his lens is so good and i do not know how to use it and my photography skills are damn lousy. I said "Thank you" and i left.
Know what? After i got on to the MRT, he called me on my phone twice and scolded me for wasting his time and effort. But to me, looked like i was the one who had wasted 2 hours to go to his place and back home empty handed. This person is still selling things in BnS but i will never go look at his posts again.