Is three or four hundred astrolabes accurate?

The astrolabe is accurate to three or four hundred, regardless of the price.

Is astrolabe astrology really accurate?

That's necessary. Many great men have used astrology to tell fortune, which is very accurate. If you want to know your destiny and change it, you can go to Daoxing Sanren to learn. After a few days of study, you can have the skills of Yi School for decades, because their teaching is simple and straightforward, and they don't brag about themselves with gimmicks, but teach real kung fu and real skills.