Throw your regular paty, get pissed/drunk, stoned etc, and all you have to do is have a few Win 7 pictures here and there. Who doesnt like to party? LOL, not like you'd have to tell the guests the reason beind it, just have a normal party as you would do on a bday/special occasion.
Heck, gatecrash someone elses party with a few Win 7 stuff, stand with the crowd in the background, face cam, smile and you just threw a party for win 7.
Ebay is a laoda bs when it comes to legit and copy material. Win 7 is 1 DVD with the choice to install 64 or 32 at installation setup stage, prior to formatting.