Hello, I am thinking about picking up a used Surface Pro 3 for $650. It is the i5/4GB/128 model, with Type Cover, sleeve and a Microsoft mouse. There is still a bit of the 1 year manufacturer's warranty on it. It looks to be lightly used and in pretty good condition. I think $650 is a pretty good deal, but I cannot help but to feel a bit apprehensive about purchasing it. What do you all think? Am I still able to get the Microsoft Complete, since it is still under warranty? That will put my mind at ease a bit. Thank you in advance for your help!