At this time newegg like some other vendors are low on inventory typical until they have a summer blowout sale in order to restock for the fall. The problem with buying from EBay is the no return poilicy there. If you get a bad cpu you'll most likely be stuck with it?
Generally when testing a board outside the case lying on a non conductive surface you simply take something small and metal like the tip of a small flat head screwdriver or paper clip to press it against the two small pins for the power button. You'll see at least small block of pins on the board where the wires for power, reset, power led, HD activity led, and for a board speaker are also located. Most boards will have a different color for each set of pins found there.
You jump there for a few seconds only until you see and hear everything start up. A second block of pins is often seen depending on make and model for additional usb ports as well as front or top of case audio jacks. The board's manual is the place to look for the diagram for power connections. That will show which pins are for power. But you really want it in a case for any long term use since there you will have fans foor cooling as well as being electrically isolated and grounded properly.