As far as I can tell it costs almost 10 times as much to send a letter certified mail (or any other option with tracking). And it means I can't just use a regul

As far as I can tell it costs almost 10 times as much to send a letter certified mail (or any other option with tracking). And it means I can't just use a regular stamp, I have to go to the post office or use a third party service like stamps.com and print out a label.