I'm not sure whether Soushiyajou Set ("Abandoned" Yard Set) and Rittai Sumioroshi Set (Yellow ED-70) counts, they are part of the rural reciprocating series although the parts doesn't indicate rural otherwise (maybe the logs and the wagons would indicate as a yes). There is one now for 13000 yen, I'm participating in that bid war probably throwing in 30000 yen for a start since there are no YouTube videos showing these sets.
That Barn and Farm Truck set is something I haven't seen before sold individually, only seen it in the bigger, train set. I have seen so much Plarail stuff I am always amazed and appreciative when a member shows me something I haven't seen before.
Seeing that Farm Truck from 1976 reminds me of a question that the answer has always eluded me...when did Tomica or, if was a different name, start making the 1/64th Die Cast Cars? I can only assume that it was sometime after WWII.
I love that bus Vio. I am not sure I have seen this exact one but I do recall seeing the people graphics through the windows which I think was cool.
You have seen the white bus, the yellow bus origin and packaging is very unknown at the moment.
Both buses have tin windows and plastic bodies, sharing the same chassis as the original black electric plastic train 1961.
Don't just thank me. Our team are always hard at work 12 hours everyday doing research so it is a group effort to find information of such dangerously scarce Plarail!