Office products can be purchased in a lot of different places. Some businesses choose to purchase them in bulk from an office supply company. Others choose to find the best prices instead of just ordering from the same place all of the time.
Many department stores will offer great deals on these during their weekly sales or special sales that they have. Some office supply stores will offer these sales too. During back to school sales is a great time to look for these deals. It is a very popular time for everyone to be looking for this type of product. More info: Office Products NYC