I suspect that anyone responding with „I have sold similar at those prices“ is just a plain liar. Searching the actual sales gives a better account than communicating with the type of people who price tat at such ridiculous prices. Such people are usually of the untrustworthy and non law abiding types (we have all met them at markets and coin shows), eBay and online sales platforms are just another way for them to push their sales.
Just ignore them, if someone gets conned into paying that price, they will learn from their mistake / and or they have or had too much money in the first place! And although I would genuinely feel sorry for someone who has made a mistake or has been pressured into parting with money they don’t have, eBay and other sites have buyer protection and ways to refund the buyer if they are not happy.
One further thought, when eBay first became popular and spread to the masses, criminals were laundering money on the site, one person would sell something to another person (lots of money for f all), cash on pick up (none actually paid), but an online record of a sale for x amount of money was produced - and used as proof for the potential large amounts of cash in the sellers possession from, for example theft or drug dealing. It is logical that small rare error coins for large prices might be a good way to continue such practices, irrelevant of selling or just advertising these items.
Ultimately anyone is entitled to sell anything at any price - there is no law against such practices on a private sale, the terms rare, error and such are just the hook to try and get people interested, and as collectors and experts we can only advise people on the forum by countering such claims and not enabling further sales by strongly debunking the narrative from the one post members asking „how much is my coin worth?“
„If your reply or post in the Forum stinks of AI, I will call you out! Knowledge comes from experience, the I in AI stands for incompetence.“
