Needed: Old Copy of Microsoft Office

I have the newest version of Office on my main computer, but I teach from the front of the class using a donated computer with free software on it.  Most of the time this works great, but sometimes OpenOffice (the free software) doesn't talk very well with the Word documents I created on my other computer.

So, if you have an old copy of Office (2003 or better) in a box somewhere, would you mind donating it to the class?  It would need to be a legal copy that is not already loaded on another computer and it would need to have the key with it.

Thanks for thinking about it!