He can buy one, but it may not be the one he's after. Kross wishes it were that easy he'd just run off with the key himself. ;(

Some might! Some might not. Some may even come into play in a mod plot capacity later. Though I fully encourage players to use whatever items they get for their own plots if they think of anything, provided they buy something that gives you ideas!

I've got a file I've been maintaining since December with various things, so. And I'll be keeping track of who has what in case of any future developments.