Before revision:  To eliminate each unintuitive equilibrium, we design an indirect mechanism that elicits both parties' common knowledge of the buyer's off-path belief after the mechanism itself is offered. The mechanism uses the elicited belief to decide what allocation is fully implemented. We characterize both parties' interim payoff vectors in intuitive equilibria. The result implies the uniqueness of the seller's payoff vector .
After revision:  We also characterize the ex-ante social surpluses in intuitive allocations. These intuitive allocations are inefficient in general owing to the effects of signaling and screening .