Kantaro: Thanks!
kissakai: Thanks! SteveM translated the artist name on the box of number 4 to be 貫齊 (Ikkansai)
ROKUJURO: I went to the estate sale with the hopes of acquiring a katana (since there were several), but they ended up running far beyond what I was interested in spending. The tsuba collection caught my eye and I was able to get them for what I thought was a reasonable price. Numbers 5, 17, and 12 are the one's I'm most drawn to at this point. As for #1, my wife came in while I was taking the photos and picked up a couple of them... I missed that she put it back upside down! Ha!
Better picture of #5: