I'm surprised this isn't in the Smithsonian or something. Instead of just some random train museum in Miami....,(reply>), IIRC, the Smithsonian was very much interested in it, but the acquisition process was quite complicated and time-consuming, with committees and board meetings and all manner of approvals going up various chains of command.  The Miami Railroad Historical Society (as it was know at the time) simply had to meet once, approve it, and write a check to acquire this bit of government surplus.