The US Post Office is quite remarkable

For 48c a letter can be picked up from any of over 100 Million locations, and within one to three days, bo transported thousands of miles, to any of over 100 Million locations, with a precision which is remarkable - much more accurately than Fedex or UPS, which will charge about 40X as much. Other Western countries charge around twice as much and cover few far locations and far smaller distances. We see one of the most effective and accurate services ever to exist, at a price that is unequalled. Yet, we fail to value it enough and never think to marvel at how it achieves this. When it finally dies, our descendents will find it difficult to believe.