If you are running your own small business or selling items through eBay, using a shipping company that you find online can be a cost-effective way to send your shipments. These companies offer a good discount compared to shipping chains, and can also be a safe option.
You can even get quotes from several of these companies and choose the one that fits best with your needs. This will allow you to read the feedback and reviews of a shipping company before you set up a transaction and, if you mention in your request that you plan on shipping multiple items on a regular basis, you may be able to get an even larger discount.
Finding a provider that you can work closely with you to handle all of your shipments will take a weight off of your shoulders.