To me it sounds more like anger that they did not get them first. I think that we have all been on both sides of this situation; one time getting something cheap and the next time you waited too long. The sad part is that the seller gets upset because they feel that they were cheated out of more money but seconds before that were happy for the amount they were paid. Like anything, if you want to know what something is worth then you need to spend the time; and sometimes the money, to get a more accurate value. Even if the person did know the true value they may put it up for more than it is worth and never sell it.