Apple shares are a good buy depends on several factors, including your investment goals, risk tolerance, and market conditions.

An general overview on my point of view would be as follows:

1. **Berkshire's Decision**: Berkshire Hathaway, led by Warren Buffett, is known for its long-term investment strategy. If they decide to offload a significant portion of their Apple shares, it could be due to various reasons, such as rebalancing their portfolio, seeking diversification, or taking profits after a strong performance.

2. **Apple's Fundamentals**: Consider Apple's financial health, product lineup, market position, and growth prospects. Apple's strong brand, innovation in technology, and diversified revenue streams are positive indicators. Analyze their earnings reports and future projections.

3. **Market Conditions**: The broader stock market environment and economic factors can influence Apple's stock price. Consider interest rates, inflation, and consumer spending trends, which can impact Apple's business.

4. **Analyst Opinions**: Look at what financial analysts and experts are saying about Apple's stock. Analyst ratings and price targets can provide insights into market sentiment.

5. **Long-term vs. Short-term**: Decide whether you are investing for the long term or seeking short-term gains. Apple's stock has been a strong performer over the long term, but short-term volatility can occur.

It's crucial to conduct thorough research or consult with a financial advisor to understand the specific reasons behind Berkshire's decision and how they align with your investment strategy.