Focusing on the art market, where auction houses act as brokers between art sellers and buyers, we investigate whether more experienced brokers achieve better performance as information providers. We use a unique data set of auctions of Italian paintings in various houses around the world, and we measure experience as the number of times an auctioneer has auctioned the artworks of a certain artist in a given location. We find that more experienced auction houses (i) are more likely to sell and (ii) provide more precise pre-sale estimates. These findings suggest that experience plays an important role for brokers to reduce illiquidity and opacity in markets with asymmetric information.