My complaint is when chips are purchased via the forum and then immediately resold to other chippers at a marked-up price. That action exploits the generosity of the original lower-cost sales and transfers the profit into the flipper's pocket. That's the true definition of "flipping" to me: exploiting an existing PCF sale to generate additional profit from a subsequent and nearly-immediate PCF sale. Flipping is a fast act with limited ownership, a parasitic tax intended solely for profit.
That was mine, and it was fun to help other friends and members get the extra high denomination chips that I wasn't planning to use. However, the reality is that some folks took the chips that were sold to them at cost and sold them for fairly high profits within just a couple of weeks (i.e., when the natural market price correction occurred). I was a bit disillusioned when I saw that; however, I now simply try to deal with chippers that are good friends and don't bother trying to correct the inequalities that exist elsewhere. Initial purchases and sales that are separated by time don't bother me as much, since the buyer is taking the risk of an adverse market correction. Buying cheaply from
eBay/Craigslist/LetGo and selling for higher prices is also OK with me, as chips are becoming available to the forum that otherwise may not have been. I did that with the LCOs, and nobody has ever called me a "flipper" from that little adventure.
All that having been said, folks can do whatever they want to with chips they buy. After all, they are their property. Certainly selling "at cost" can be seen as an altruistic gesture, but plans change and surprises happen so l don't think anyone is qualified to be the forum judge and jury. Judging flipping is like judging porn, you know it when you see it and it's subjective to each individual. Just my $0.02 on the topic....