Until you sign up for a Business Account, you WILL NOT see the actual cost to you. I pay less than half for the products shown on the site, and I NEVER use the USPS mailers or FREE shipping from anyone on “Time Sensitive” products. RTCA has a policy of results back same day as received. I always ship out same day as picked up and using Overnight service. This equates to results back the NEXT DAY! Very rarely did the deadline get missed, usually from weather conditions disrupting shipping.