I go to a swap meet in the area every Sunday and i never fail to hear some variation of this:
Buyer: "How much do you want for that safety pin?"
Seller: "Fifty dollars."
Buyer: "Wow...why so much?"
Seller: "Well, on eBay, they're going for $200."
It seems at times that some people don't know that a ridiculous asking price isn't the actual value of the item. I've run into this few times trying to buy machines.