This type of sellers are "very very busy" and we must to understand
@Robyries 
...
When a person try to sell masks in large quantity he must to have 24/7 support, but this seller has another strategy.
I hope that @leenaleena is a correct seller but he has the same strategy with scammers:
Many BHW members are interested about masks and he wait to have many interesting persons and after he will reply to all in the same time! - a scammer can runn with the money of more than one person when he speaks about the same deal with many persons in the same time!
We can see that the first interested member Robyries from this thread haven't an answer until now!
I think that in this situation are minimum all the members who just reply in thread to his offer with large quantity of masks, but in my opinion only desperate members who sent PM to OP have a reply or is possible that 0 members to have an answer from OP!
We must to know that for this type of sellers a BHW account is nothing!
AGAIN: I can't say that leenaleena is an incorrect person, but he has a strange strategy 100% and in my opinion these things aren't normal!
In the same situation is and this BHW member
@IG Professor with an aged account with a good reputation, please check his thread also with unlimited masks:
https://www.blackhatworld.com/seo/jv-unlimited-amount-of-masks-huge-opportunity-kn95-op-masks-available.1212795/
He is also very busy and have no time to answer me in telegram, he has time only for read my messages!
@IG Professor is in a complicated position with his workers, in his company he as a owner want to make deals with me with escrow services but his workers don't accept escrow !!!
Here is funny situation the workers don't respect IG Professor!
So more attention with these deals with masks and with support line like in holiday!
ALWAYS USE ESCROW SERVICES ( https://www.escrow.com/ ) FOR THE SECURITY OF YOUR FUNDS!