It’s ok a lot of the North America stores operate in similar ways and advice can be applied generally
For MK there’s a high chance 20k won’t even cut it especially if it’s the more popular specs (colors). Some stores will not even offer one as a first time offer to a new client. They want to give the most sought after bags to clients who enjoy purchasing other categories
and have proven that they are shopping Hermes long term.
B30 is going to be easier. Again resale prices can give a feeling of how popular (and hence competitively difficult) a bag is. You will see a lot less ridiculous markups on the 30s. 35 is in a different boat, it’s not that competitive (most people are chasing smaller bags) but as a result Hermes has lessened production (redirecting artisans to mini bags) and managers have elected to order less for their store. Sounds like yours may have only ordered the basic colors which he/she thinks are the only ones that would have demand amongst the store clients. I’d say for a 35 you have to be patient for that reason, but do not need to worry as much about “outbidding” others. Letting your SA know that you want one (and hence maybe nudge your SM to be more open to order some next podium) does not hurt.