It is not known exactly how much he paid for them, but it is thought they had a price tag of more than £80,000, the price of a similar set of models bought by a Japanese collector.
Jerry Goldman, director of the Albert Dock attraction, said: "We are absolutely thrilled to have the models here. We think they will be a huge hit at the museum.
"They attracted a fair few glances and open mouths as we were transporting them from London to Liverpool. "