I can only give you my definition of a shark. Most pin traders are nice, honest people. But there are a few that make money at the hobby, mostly by selling on Ebay. If you aren't aware that a pin you have is very desirable, perhaps very limited or retired for a while, they won't tell you. If they have a pin you want, they will try to trade for your most valuable pin. If the trade makes you happy, it doesn't really matter. But my daughter has traded with people that have told her that a trade she was willing to make wasn't a fair deal for her, I thought that was really nice. If someone looks at our book and sees a pin they like, I try to pick out several that we like in their book that might be a fair trade. If we come to agreement, that's great. There are so many pins, it's really hard to keep up! Diana
Edited to say that selling on Ebay doesn't make the person a shark! Most of those traders are nice too. Also edited to add that this doesn't apply to CM's trading from lanyards, no sharks there! Do keep in mind that some CM's will display a favorite personal pin on a collar, or sometimes a nametag or personal picture pin on their lanyards, and they are not required to trade those.