I have used checkpoint since SR2 and can't recommend him enough. He has a very professional and tight run ship with some very cheap high quality MDMA.
Another vendor RICHARD_KUKLINSKI has caught my eye due to his very cheap pill prices. He also ships out of Belgium and from what I remember was also very popular on SR2/Evo. I have not found much info about him regarding bulk shipments on either forums or reddit and wondered if anyone had any experience to share?
I bought some bulk pills off him and they came in about 8-10 days with an extra 10% of what I ordered. He's a decent guy with great comms