Thanks, Yes. I was tempted by a fellow C10 guy who kept posting his truck with a ATC70 in the bed. Because of my ATC upbringing (110 was my first) I HAD to have one and found those three in San Marcos; $400 ea, $1,200 total. I was so much on the hunt, I talked him down some; but it was hard to put up much fight. First thing I did was pull those nice looking, but rusty, tanks off and put them away for later restoration - ordered some plastic tanks and import carbs. We were racing around the yard in a few days. They are all same year, '79 IIRC. The PO said his grandmother bought them all at the same time for family - but I don't know if that's completely accurate. Two are alike enough that I'd believe it - but the one in the distance is way off serial number and doesn't give the impression that it was as well kept as the other.
I'd like someday to take one and really do it up right and ride the other two. Two of them would be great candidates for a genuine restoration; they are very clean considering the 70s are the Cessna 152s of the ATC world.