There have been several occasions when a well-meaning member will take it upon themselves to price-police, and because they weren't aware of all the details or circumstances ... or simply were confused ... they were wrong. Meanwhile, the first people to look at the ad, who often tend to be the ones seriously looking and most likely to buy, are turned off and move on .... and the seller gets screwed. An after-the-fact apology from the well-meaning thread crapper doesn't cut it at that point.
Prices fluctuate for practically every single item there is ... especially on an international level. If someone in Europe purchased something in Europe, they shouldn't be forced/goaded into selling it below the cheapest price available in the world. It's very possible that to someone who lives locally and can view, test, and pick the item up themselves, saving shipping and perhaps even taxes and customs charges, a price that may seem high to someone else, may still be, if not a bargain, still worth it to them.
IMO, price-policing is just as much a thread crap, as butting into someone's For Sale thread and trashing the item someone's trying to sell. Posting "You can find that item cheaper elsewhere" is pretty much as bad as posting "This item sucks, item B sounds much better."
If you feel the need to protect consumers from what you perceive as a high price, then go stand in front of any Starbucks cash register and tell everyone ordering that they can buy coffee cheaper elsewhere, but please don't price-police other people's For Sale threads. Unless they ask, let people decide for themselves what an item is worth to them. There are reasons for the old saying "Mind your own business."
