I had MOS and OS4 dual booting on it at one time but I can't remember if I left MOS installed on it before I put it into storage back in 2010. Before I boxed it up for shipping I powered it up make sure that OS4 was running properly. It also has a few apps already installed...AmigaCygnix, AbiWord and Gnumeric....
The winning bidder will also get the MOS key emailed to them if they want it.