The value of a 1955 Lionel train set can vary greatly, depending on the condition of the set. The most valuable post-war Lionel trains are rare, mint-condition items such as the Black Lionel 2360 Vagell GG1, which can sell for as much as $15,000 US. However, the set could also be worth as little as $10 US. Smaller pieces of the set such as track, scenery, or signals can sell for up to $250 US.