All of those original Xbox games on eBay could have new life breathed into them if Phil Spencer gets his way. A recent exchange on Twitter indicates that the head of the Xbox division asks the backwards compatibility team about including original Xbox games a “lot”.
There were over 900 games published for the Xbox though some were exclusive to certain regions such as Europe. The Xbox One backwards compatibility feature is currently in beta for preview members and is expected to officially launch with over 100 compatible games by the end of this year.