When bulk buying helps
Bulk buying works best for supplies used every week in predictable sizes: labels, tape, common mailers, standard boxes, and packing paper. It is less useful when the seller is still learning which sizes actually fit the products.
The hidden cost of bulk
Bulk supplies take up space, can be damaged by moisture, and can become obsolete if product sizes change. The carrying cost matters, especially in a home business where storage competes with living or working space.
A simple buying rule
Buy small to test the size. Buy medium to prove the workflow. Buy bulk only after the supply is used consistently.