More closely related to the original topic, as others have previously mentioned, among those of us who aren't fans of flippers, there definitely seems to be a majority consensus on the extremes of both ends of the spectrum (selling a $100 knife at cost isn't flipper behaviour while someone selling a $100 knife for %100 markup certainly is), it would seem that hashing out the grey area in the middle to define where the definition of a flipper starts and stops is likely not going to be easy task if it is at all feasible.
In my mind, the best way to apply the label would be on a case by case basis with different tiers (it's been mentioned about having members voluntarily donate their time to looking for the offenders). So if someone was identified as a "flipper", the person in question would have to be re-evaluated by at least one other person, or failing that, allowing the person identified as such to have a means of recourse (assuming there's some sort of action taken against them for "flipping"). However, to me, this layered solution doesn't seem sustainable or even workable as it's been articulated so far (although, I've certainly been wrong on many an occasion).
In my mind, the best way to apply the label would be on a case by case basis with different tiers (it's been mentioned about having members voluntarily donate their time to looking for the offenders). So if someone was identified as a "flipper", the person in question would have to be re-evaluated by at least one other person, or failing that, allowing the person identified as such to have a means of recourse (assuming there's some sort of action taken against them for "flipping"). However, to me, this layered solution doesn't seem sustainable or even workable as it's been articulated so far (although, I've certainly been wrong on many an occasion).