I just made a deal on a part and it can be shipped in a small flat rate box for $8. The guy says his Post Office charges $4 for the box? It is not killing the deal in anyway and I am not complaining but I have never heard of it ever. All Post offices around here and in other states around here I never had to pay for a flat rate box even in USVI St. John they were free as when My wife and I go down we shipped some stuff ahead of time. I have never paid for a Flat Rate box. How about others in the US?