excessive first class mail charges, over $4 on 1st class one ounce envelope.

[get2thebarn]

When the shipping page comes on, it says the type of USPO shipment is chosen by the buyer, and 1st class comes up as a $3 or more charge - even on a one ounce package. How should I handle this?

[inceptions]

That is correct. A one ounce First Class package - Commercial rate - ships for between $3.62 and $4.26 depending on shipping zone.