Honestly, I don't ever remember seeing a single listing where someone posted a set of chips using the "this is what it would take for me to let these go" pricing followed up with "if there are no takers at this price, I'm keeping them", only to later bump the listing with "price drop, taking offers" or something similar. I'm not saying it's never happened, but I don't recall ever seeing that happen and if it did, I would assume it is an extremely rare occurrence and likely has some sort of reasonable explanation behind it (e.g., recently lost their job, or are now dealing with a family emergency of some sort). I think you are conflating these "pay me X or I'm keeping them" listings with othereise normal listings where someone simply posts some chips for sale and later lowers the price simply because the demand is lower than they had anticipated.