I have a NIB BUCK "Ecco" 3.0 double bladed folder. I aquired this knife in a multi-knife trade. It has the following catalog numbers on the end of the box: B275-BK-0 CAT# 5090. I had never even seen this knife before but admittedly I am not an Expert on BUCK at all. It seems like a quality built knife like all BUCKs are. Even though I do have a few BUCKs in my collection they are probably the more popular ones. I would appreciate any feedback or you can PM me. 
