Well first off I should say that my CAD college classes were done on AutoCAD 2005. I did not own a computer of my own at that time and thus I did not purchase the student version of the software but just used the system installed on the campus computer system. Now that I'm no longer in school and have my own personal computer system I find myself desiring that program or similar for my own personal use for my own projects. I have checked out most of the free downloads online and haven't found anything that suits my needs, got close with a couple systems but one of them the Snap-Point and Trim functions sucked and the other the dimensioning system sucked. So next up I'm looking into buying the actual AutoCAD software used and have been able to locate several different versions of the 2004, 2005, & 2006 software for reasonable prices I can afford for personal use. I have run across several descriptions of the items being sold including "Never Installed / New in Box" and "Completely Removed From Previous Computer & No Longer in Use -- Activation Code included". So if I were to buy any of the used systems falling into those descriptions could I successfully install and use it? If it's still new in box will I still be able to activate it with the software componay after such a long time? In the other case,as long as it is true that it has been completely removed from the previous owners computer can I legally install it on mine and use the same activation code. I have no problem buying this particular slightly outdated and used software system because I know it will meet my needs and I am fully trained on all of its functions but want to make sure everything is on the level and I don't get "taken".