personally, and i do speak for myself only,
people who generally deal with import/export know exactly how to get their goods.
+ with internet now, it has never been so easier. ( of course there is bad and good suppliers but with a bit of work you can generally clean up 90% of the unwanted ones.)
there are plenty of facebook group like that and even if it start with the best intentions, too many trolls will shattered your dreams.
you want to do some business it is pretty easy, get your clients, get your suppliers, and even to be a middle man, you will need to create ur company. no one will ever pay you based on trust.