I would avoid buying bulk of most drugs on SR, possibly weed being an exception. Also possibly exceptions for people who are highly vouched for. Anyone can be a vendor here. Dealers buy from bulk vendors. If the police want to bust dealers, it makes sense that they would set up as bulk vendors. I think it is not unreasonable to assume that they may even set up as vendors to bust smaller time buyers, although perhaps there is less concern for this. It doesn't look like they are doing this so far anyway, considering the low number of busts we are aware of regarding buyers, which is pretty much in line with what we would expect from interceptions. Of course if the police intercept $50,000 worth of heroin they are going to raid the address it was shipped to, that much is obvious. That said there have been successful and legitimate bulk online dealers, and people have even shipped millions of dollars worth of drugs through the mail (although not online vendors afaik, although there have been plenty of hundred thousand dollar + shipments). There are private forums for bulk deals, where vendors get in contact with big suppliers. These forums are invitation only and you cannot vend on them unless you have been vouched for by a lot of people who have multi-year reputations and have just as many people willing to vouch for them. That is the environment for bulk dealing imo, SR is perfect for dealing to end consumers and small time dealers though.