@srfnmnk, I’m a little more picky. I transfer my projects to a permaproto board like this one from Adafruit and I used headers for the Photon. I tend to connectorize my projects using JST or just female/male header pins. I have also used a Biscuit Board which is a semi permanent breadboard.
For boxes, I will shop around based on how fast I need them (local, DigiKey, Mouser, Aliexpress).