Amazon recently teamed up with the US Postal Service to begin offering Sunday deliveries to its customers. In the past, you had to pay exorbitant amounts using Express Mail and tack on an extra fee if you wanted something delivered on Sunday. Not anymore. The new service has already begun in New York City and Los Angeles, and will expand to most of the rest of the United States next year. The USPS has struggled recently as fewer Americans are sending mail, opting to pay bills and communicate with friends and family online. This deal is expected to help the Postal Service’s turnaround effort as it brings in money and also opens the door for more partnerships with retailers eager to offer Sunday delivery. The move makes sense for Amazon as it takes aim at one of the few advantages brick-and-mortar stores have over the site: Sunday shopping. We may be the biggest winners of all, though, as we now have more shopping and delivery options than ever before. Shop away!