Gavelby's Auction House is an auction house.
When Homer and Bart started collecting coins, the last one they needed for their collection was the Kissing Lincolns Coin. They visited the auction house to buy it, but Mr. Burns was there, too, and bought every coin being sold, including the Kissing Lincolns, for $10 million.
The Simpson family later went here to sell a painting they bought from the Van Houtens.
Its name is a parody of the famous Sotherby's Auction House.