If in doubt about something, just ask. Depending on the shipper or service, sending that package coast to coast may cost more money. Some charge flat rates while others divide the U.S. into zones that vary price on destination. Added coverage may be available on a sliding scale depending on the good's value. The condition is usually better than that of a homemade job.
Time is money.
If a box must get to Hawaii tomorrow, expect to pay a premium over getting it there next week. If a box breaks, you may be responsible. That could mean shipping a replacement or offering someone a refund. Prepare a package with care. Check with the carrier about potential problems or consider repackaging the items.