You have just put it the most correct way. This is exactly what I am trying to say. How on earth would someone buy a used item when they know the price is higher than the price of a new such item (without being aware of the bargaining game)?

In fact, it is in the interest of the "rushing" expats to set the thing at a genuine and reasonable price and write clearly: no negotiations. Anyone who would need the item for the price would go and buy it.