Some of the sales listings I see are either greed or sellers who are not clear on the concept of value.
They are willing to take the risk of an item not selling because they have a price in mind that they want. Who am I to judge that as "greed"?
It's their price -- it's their calculation.
If they get their price, we've established what the market will bear.
If they don't get their price, they suffer the opportunity cost of spending more of their time trying to sell it.
I cannot fathom how greed comes into it at all.