One of the rumors I heard what to do with these items were: Take the Super Sweeper to Cid's wife (I forgot her name) and she'll fix it up and it'll join your party; The Masamune gets you a Sephi clone, as previously stated; And the 1/35 soldiers go on a mantle in the Costa del Sol home. I'm not saying any of them are true, I'm just telling you for 's and giggles.