Whats the rarest Tomy/Plarail train you own?

[Super]

Mine would have to be the F7A Amtrak.

Ah, the F units...love them. Good topic for a thread.

I am not sure exactly what we have that is the rarest. We have many hard to find trains especially here in the States. I am guessing but the rarest of all we own might be a recent purchase and its a new in the box C11 set I think.