I want to share my experience from last year (2020) in Rome. I had been in Hermès boutique only once before in different country and was only admiring different items that time. Nothing more. So I decided to visit Hermès boutique in Rome during my short vacation well prepared (studying information about the brand). After talking for a long moment with an SA, I asked straightforward about Birkin. The SA told about waiting lines and "the usual stuff" about high demand. Then she had short conversation with her colleague in Italian and after that she escorted me to the private room to wait. I waited less than couple of minutes and I knew, after my studies from blogs, that it takes usually more time when they are going to offer quota bag. BUT, it was a Birkin 35 in malachite GHW!! I was so stunned of the bag's beauty so of course I bought it. All in all, my first Hermès purchase ever, first time to ask about anything from SA, I was wearing my Zara dress, nothing luxury on me. And I was a tourist and got a Birkin as a walk-in.
I've heard that sometimes this could happen if someone has just rejected the bag offer before or the brand wants to "hook" a new client. What ever it was, I was lucky. And I also believe you'll get treated the same way you treat others.