These are among the few authorized retailers that sell stamps slightly below face value. For example, a roll of 100 Forever stamps may be priced at roughly 0.3% below retail price.
The best way to buy in bulk depends on whether you are looking for physical stamps or discounted postage rates:
Authorized retailers offer large formats like rolls (coils) of 100 stamps.
For organizations sending large quantities, the USPS offers which are significantly lower than retail prices. Postage Options - USPS
