Hi.
I have some OEM Vista Business DVDs which I haven't used at all, only the seal opened so that the product key is visible.
The thing is, when I'm about to sell these, noone would believe if the DVDs & Product keys are still unused, just because the seal has been removed from the boxes and the keys are visible.

I couldn't think of any way to prove that they keys are still new and unused.. Is there any way, instead of installing it of course..?