Hello, I have an opportunity to buy this:http://www.everymac....bolt-specs.htmlfor $800 (oh, it's the 4GB RAM model). Is it a good deal? I will be using it for Photoshop CC, Illustrator CC, Dreamweaver CC, Filezilla and native programs like Garageband. Everyone in my office uses a Mac except me. I have an old Dell Latitude Core 2 Duo that I use and it is really showing its age. They will not buy me a Mac. So instead of raking out the cash to buy a brand new one, I looked on Craigslist. I know, I have to be careful on Craigslist, but I am going to go check it out before I purchase it. Let's say, for the sake of argument, that everything is good to go. Is that machine still good, even though it is almost 4 years old? Thanks in advance for your help!