Lets take these two scenarios for bulk orders:
Vendor sends empty box claiming it was full.
Vendor sends box to someone in same city and claims it was you who picked it up.
Vendor intentionally sends wrong wrong product
Vendor sends bunk product (10% purity instead of advertised 80%)
If the vendor has been around for at least a half year as a vendor and has a decent reputation, do you think there's anything a customer can do?
that's 4 scenarios