15p cheaper at Amazon and pretty easy to return if faulty.
Disconnect power and open case. Select a bay for your hard drive and screw in to place. Insert power and sata cable to hdd. Insert other end of sata cable to socket in motherboard. C: drive usually on sata socket numbered 0 or 1. New drive should be on sata socket numbered 2 ( or 1 if C: on 0). I can't see if it's OEM on the ebay site but is on Amazon. That means you'll have to buy a Sata cable. You can pinch two of the machine screws , one from opposite sides, of the C: drive to fix the new drive until you can get some more.