You can also consume this item to change your profession to a Level 6 Flesh and Blood Train.
It's like giving you another chance to choose.
It's useless for him, but if he sells it, he can definitely fetch a good price because... an S-class potential Flesh and Blood Train can become an S-class potential Mechanical Train after using this item!
It's like taking a shortcut!
Turning into a Mechanical Train is much harder than the transition task for a Flesh and Blood Train.
However...
An S-class potential Flesh and Blood Train is also difficult to achieve...
He actually really wants that Doomsday Marriage Certificate too. If he could find another genuinely loving couple, he could earn a net gain of 200 Heritage Value. The downside is the need to stock the goods for too long. In the apocalypse, finding a couple that can be recognized by the "Doomsday Marriage Certificate" is not an easy task.
Before the apocalypse, in that peaceful environment, doing business focused on liquidity.
