Rarest Plarail/Tomy Trains

Busy bee James is becoming very hard to find, and increasingly expensive, but with determination and money it can be found and aquired...but a true RARE train cannot be found!! Trains that are only seen a couple times a year at auction...
Also, after considering the 4 I mentioned earlier, I would rank T'nA Henry & Gordon as equally rare for these reasons:
Though I have yet to ever physically see the Henry model, there IS an image of the train and box online to view, but there is only an empty box to show for the Gordon model...AND of the D&D snowplow set, though it is rare and fetches an incredible premium, I have already seen 6 different sets come up at auction in 6 months, where as in the case for Alfie I have seen maybe 10 over the course of 6 years!!
THIS rate of frequency in availability is what truly determines RARITY.
All the money in the world can't buy something if you can't find it.

My younger cousins have 4 busy bee James there parents got the oldest cousin one of them but my parents got one for him to I told him there were really rare so he asked Santa to get him one istead he gave him two one of them was used and had broken wires the other was to 5 years later the other two brake they throw them area istead of giving me them to fix because I can fix engines so yeah it happened when I was 5