I don't know if this section of the forum is restricted to the early 70's 510s or the 1980 is included as well, but I will post here anyway.
Back in September of last year I went to visit family up in Yakima, WA and my grandmother spotted a cheap car for sale at the trade school in town. For $400 I was able to buy a 1980 Datsun 510 SW that had 150k miles on it. A month later my grandparents came down here to AZ, towing the 510 behind their motorhome.
Since buying the car it has been my daily driver and has performed admirably, with only a few mechanical problems.