This is closed now. I’ve chosen the adafruit design as it is open hardware (https://github.com/adafruit/Adafruit-Prototyping-Pi-Plate). The board manufacturer (iteadstudio.com) I use charges $US19.90 for 10 boards (will be green).   Shipping is about $US0.50-1 each (varies a lot with the …

Raspberry Pi protoboard/connector group buy – $US7 each Read more »