15$ if you give them your windows 7 license to "upgrade" from a recently bought PC (though it's a full installer ISO, can wipe clean and install fresh). I think the date for the PC purchase had to be starting from summer 2012.
Around 40$ for the same thing for anyone else.
The prices are going to shoot up to your typical windows pricing soon.
There's ways around this of course. People can upgrade their illegitimate copy of Win7 to a legal copy of Win8 for $15.
:whistle: