As i said before, i see no problem that anyone sells their knives for the whatever value they feel is adequate. If it's too high, it won't sell. It is sad, though, to see people whose only purpose here is to buy it new and sell it right aftwards for a much higher price. After a bunch of sales, the pattern becomes clear. As for the part that we ourselves would do the same thing (hypocrisy), i agree that anyone who follows this pattern (buying and selling for a much higher price right afterwards repeatedly) should have the same treatment.
Also, i'm not proposing any sanction as your reduction to absurdity argument (regarding creating a thread to chastise both the buyer and the seller) does, i'm simply pilling up upon a shared feeling regarding this matter.
i was kidding, but for real, the only thing that keeps people flipping is the people buying, no buyer, no flipping, BAM!