USPS First Class Package Service is a fast, cost-effective way to ship lightweight packages weighing up to 15.99 ounces to any U.S. destination.
For lightweight packages, First Class Package Service offers greater cost savings compared to Priority Mail and
Parcel Select Ground (formerly known as Parcel Post.

I rely on my friend - who owns a mailing service and mail boxes stores in our neighborhood, since 2000 when I moved in to Las Vegas. There is the UPS, FedEx and 3 other similar
stores who are competing in the central corners in our area.

No lines, or waiting just drop them inside the store the he will take care of everything - I already get free mailing boxes and fast service.