Buy an ESP8266 board from me for $1.85 shipped domestically via First Class mail:
https://www.ebay.com/itm/113772095761
The cheapest way I can find to send any package to an address even across the street is $2.66.
Do you just stick a stamp on it and mail it like a letter?
Will you still be able to get your ESP's cheap enough after the shipping change?