In 2017 or thereabouts, I was at a train show at Lakeland College in Kirtland, OH, looking to get started in O scale. I knew very little about it, but had made the mental commitment to do it, after 3 or HO scale layouts where I always had difficulty with the track and benchwork.
At the show I came upon a set of tables where a guy had dozens of postwar Lionel steam engines. I asked him "which should I buy?" He said basically, buy what you like, and that all of them had been gone over by the seller, lubricated, etc.
I asked him repeatedly "do they all run?", and the answer boiled down to "They all run, but you won't run them, they are collectibles".
I bought a 2055- and didn't realize it at the time, an 027. I paid $178, and left his tables with the 2055 wrapped and in hand. I walked about 30 feet, then turned and came back, asking "Do you want to buy a collectible, for $250?" He just waved me away.
(By the way, it ran, and stills runs, like new. But they sell for around $ 120 now.)