I have never sold a single chip to anyone ever and the only place I've ever traded is at the convention trade session last year.
If two people sell chips back and forth between themselves that equals it out in the end. But if anyone only buys for the other i still don't see where that is fair to the person running around getting chips.
I have a standing new issue service with someone to get AC chips,for which I pay a good premium.The only reason I went down to AC was to get chips to trade with at the show. I don't expect to sell any of the chips. I only want to trade, but if someone really wants one and had no chips to trade(I would even take ones I already have) I'm sorry but would have to add my costs on to the chip price.
I bought chips at last years trading session because my own trading supply wasn't very interesting to the people who had chips I wanted and paid extra for the chips. I was quite happy with the deal.