1. A method comprising: establishing a current belief about the multidimensional distribution of buyers' valuations for at least one item; based on the current belief, proposing at least one pricing mechanism, each pricing mechanism establishing a price for the at least one item; storing observed buyers' responses to at least one of the set of proposed pricing mechanisms; conducting region censored updates to the belief about the multidimensional distribution of buyers' valuations based on the observed responses to generate a new belief about the multidimensional distribution of buyers' valuations; and based on the new belief, proposing a pricing mechanism establishing a price for the at least one item.