Not sure if this is where I should post this, but here goes. Looking at purchasing AutoCAD Civil 3D. I am not attending any school, so cannot purchase education version. Also operating on small budget, so wondering where to get a copy of the software for bargain price, if possible. I have seen some web sites advertising where you can download the software from their site for $400. Have also seen sites on Craigs List, as well as software disks for sale on eBay. So what about these sites where you can download the software? Are they legitimate? Also looking at purchasing AutoCAD C3D 2010, in hopes of getting a deal. I don't necessarily need the latest version. Any and all input appreciated. Thanks!