Also, the one with the correct pommel (the ebay one) can be seen on more people then just Tom Cruise, so a claim that it is Tom's need a lot of evidence.
Check the first screenshot in this link: Last Samurai, The - Cavalry Officer's Sword
Tom is on the left and someone else is on the right. You can clearly see the sword the person on the right carries is the same kind of sword as Tom's in the photo I already posted.
The e-bay sword does not match some of the screen-caps that have been presented here AND The Prop Store ones pommel looks wrong as well now that I have looked at it some more, so both are to be approached cautiously and need more research imo