Come see Gus the T. Rex at #SothebysNewYork before 14 July! Starring in the Natural History live auction, the 67-million-year-old specimen is one of the largest and most complete T. Rexes ever discovered. Estimated between $20-30 million, Gus is set to become the most valuable dinosaur offered at auction. Our galleries at 945 Madison Avenue are open this weekend and are free to the public. Tap the link in bio to plan your visit. The Summer Season is presented in partnership with sothebysrealty.