In some countries, such as the USA, apartments are usually sold through real-estate agents: the buyers send bids to the agent, the agent forwards the bids to the seller, and the seller selects the winning bid.
It is easy to find data on the final price for which a house was sold. Where can you find data on the other bids - the losing bids?
My goal is to build a model for the distribution of bids above the final price.
Probably, real-estate agents have such data, but do they make it public?
EDIT: I will be happy for data from any country.