I'm currently looking for a few odd ones.
Joseph Rodgers 86B two blade electrician's knife. It's hard enough finding the screwdriver-blade only version, let alone the US style two blade (which I've never seen outside of the Egginton website).
Older, stag (and fake stag) handled three blade hunting knives in user shape (they don't need to be nice, those I can't afford). While this is a Mikov copy of an old Hubertus, many German makers made them. I'm also looking for a used Mikov if anyone has one.
WWII era German military electrician's knife. I'm specifically looking for one marked Siemens. All looked somewhat like this.
And any other odd traditional patterns.