I am seeking a source for educational and gaming software in bulk. 
Specifically, I would like to find a supplier that could sell me 20,
50 or 100 copies of programs that may be 3,4 years old for $1 to $3
per copy.  Software should be brand new in sealed boxes or jewel
boxes.

I've spent some time searching Google using strategies such as "bulk
software," "software jobber," and "software in large quantities" but
was not able to uncover anything.  Help would be appreciated.

Thanks.

Ebay might have this. I often find people trying to sell educational
software for next to nothing, and if you contact them, you will likely
find they are really trying to get rid of a lot more copies of the
software than they have for auction at any one time.