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First provide a summary of the paper, and then address the following criteria: Quality, clarity, originality and significance. The paper presents an algorithm that achieves optimal regret for sellers in posted-price auctions with strategic buyers. The intuition behind the definition of Regret is not clear enough, what does a small regret mean for the seller. There should be more elaboration on the intuition. The paper is well-written with proofs and theorems clearly stated.