Selling Shaw PVR on kijiji

Hi, I have a Shaw PVR (DCX3400) that I want to sell since I'm no longer with Shaw, however I have a few questions. 1) It looks like Kijiji is a popular place to sell used equipment like this, but I have never sold anything before on Kijiji. What should I be aware of, or any tips to avoid scams, etc. I'm a little nervous. 2) I haven't been with Shaw for over an year and the PVR has been sitting unplugged. Do I need to do anything to clear my recordings or any private information that might be stored? 3) Lastly, what would be a fair price for this PVR? It is in full working condition, has the remote, and HDMI cable. Thanks.