FWIW, I go through my auction tracker prices (url in my signature) every couple days. I have a process that both looks for prices that are obviously meant to be in k, but aren't (like a price of 2 for something that normally sells around 2k), prices that are wildly beyond standard devations (if I have enough data points), or prices that are mere fractions or big multipliers of the mean (if I don't).
I remove the prices that are beyond "normal" in these cases, but I try to leave the ones in that are actually advertised as such, even if absurd.
You can't catch them all, and there will be gouging and sellers trying to get a profitable price by starting high and coming down over time. But, I try.
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