The most expensive car ever sold at auction was a one-of-two 1955 Mercedes-Benz 300 SLR prototype that fetched an exorbitant $142 million at a 2022 RM Sotheby’s sale. The priciest watch ever to cross an auction block was a 2015 Patek Philippe Sky Moon Tourbillon featuring one-of-a-kind craftsmanship so desirable, the final bid hit $5.8 million at a 2023 Christie’s event. In both cases, it was ultimately a combination of quality, brand recognition and extreme rarity that resulted in record prices.
But in the realm of fine firearms collecting, the X factor that often pushes values
