too bad the new mazda's aren't built like the originals.
I had a 1990 B2200, when i let it go to buy my F150, she had over 400,000 and was still running. I've seen 2 others with with HIGH mileage. one had over 600,000 and the other was 875,000. Like mine they still have the original bottom end, but the top had been redone. for mine, it was the head gasket, and lifters, but my bottom end was on its way out, and I had an oil leak. I needed the engine rebuilt & a new carb, I also needed a new rear diff. She needed much more money that I had.
My next truck might be another Mazda(Ford) B2300+ or a 4cyl Ford Ranger.