Your best options are the 'Quincy', 'Saylor-Beall', and 'Curtis' makes.
yes, the first-cost is more than 'brand X' from the orient......but, just as one example, I've a Saylor-Beall '705' here, which I was given as a box of pieces in 1989. (a rather impatient automotive mechanic former owner started to take it apart, didn't know about the special tool needed to remove some of the valves, got frustrated, and just bought himself a new compressor)
I reconned, all it needed were rings, bearings, and a valve disc/spring kit, and it has worked well ever since, feeding a glass-blast cabinet, often running 10-12 hours continuously in the 90+ deg F.. summer heat here.
Two years ago, I had it down to check rings and rod bearings. The rings and bearings did show a bit of wear and were replaced, but the bores needed only simple de-glazing, and the crank-pins showed no wear at all. It was run on Mobil compressor oil, and the oil changed every 3 months. the valve discs/springs were still good, they didn't need replacement. (the Saylor-Beall factory spares service is excellent...a 'rebuild kit' is 'not cheap', to be sure, but is quite cost-effective after many years of good service)
The Quincy make is considered a somewhat better unit than is the Saylor-Beall, as they use full-pressure oiling, instead of the 'splash oiling' system of the Saylor-Beall. I don't know whether Quincy still offers 'factory rebuilt' units through their dealiers.....if so, that would be your best choice.
The 'Curtis' make is another equally good one. Those are 'ring-oiled' which works quite well.
cheers
Carla