Most major retailers sell stamps at face value at their customer service desks or main registers.
These are ideal for late-night or weekend needs, as many locations are open 24/7. Stamps are typically sold in booklets of 20 at Walgreens and CVS.
Staffed locations offer the widest variety, including commemorative, international, and high-denomination stamps.
Supermarkets are a common "underutilized" source for stamps while running weekly errands.
Office Depot and Staples carry stamps and related mailing supplies. 3. Grocery Stores & Supermarkets
The most reliable source for a full selection of stamp designs and denominations remains the U.S. Postal Service (USPS) .