Today on Craigslist I seen a post a guy is selling his Alienware M17x for $500 as hes going to the army. I wanted to know how much risk there is buying a used laptop. Also, if I bought it and then went straight to best buy or something, would it be a good idea to buy a new fresh hard drive and memory sticks? I have windows 10 pro at home, I was going to wipe the Windows that is currently on that alienware and upgrade to pro as well. Any advice would be great on how to make this bad boy like brand new again! Thank you!!!