I've upgraded to the new version of Microsoft Office and plan to sell my old version's CD (student and teacher edition) on eBay.

My only concern is the apparent rule that Office can only be installed on three computers. Does this mean "only three computers at one time" or "three installations in the lifetime of the software CD." I installed the version on the CD I'm selling on two computers, but it's been deleted off both machines.

So when I sell my Office CD on eBay, can the buyer then install it on three computers of his/her own, or only on one computer since I installed it on two computers previously?

Thanks!