I paid more like $12.
I paid $5 each (but had to pick up locally)
why are they opened up like that? My advice for a simple non-reversible modification:
1) PS-ON : achieve this by using a tiny flattip to pop up pins 3&4 and bend them into contact with eachother. add a quick hit of solder to make this permenant
2) 12V & GND: remove all the plastic around the outer two slot connectors (the middle one is more complicated so just leave it be). this will leave 6 pins easily accessible for both 12V and the GND slots, and you can jam in as many wires as needed and have lots of points of contact for soldering. (hint: 100W+ soldering iron is needed or it will be extremely frustrating when nothing melts or sticks)
They are opened up like that so he can solder the jumper on the bottom of the board. It takes me less than a minute to open up, solder board and close back up again.
Yeah, I was using the quick 5 minute electric tape + PCI bracket to power them on. But soldering was faster. With a 40 watt iron. Your mod sounds way more intense than either the ones used on this thread.