I remember seeing a set a while back of what I believe were 531's with different battle scenes from the Civil War etched on the blades. It seemed like it was a set of 10 or 12. As far as value, I wouldn't have a clue, but being that the 531 has been out of production for a while and these knives are somewhat of a "limited edition" I'm sure that there must be some collector interest. Maybe one of our more informed members will chime in here with a bit more info.