How much is the old Beijing courtyard house worth?

The price gap between courtyard houses is too big, and there are several main factors that affect their prices:

1. Is there full property rights?

2. Has the registration been done fairly?

3. Is it a complete garden?

4. Location

5. Is it listed as a cultural relic under protection?

6. Is there any demolition in the surrounding area?

Based on 200 square meters, the price ranges from 30 million yuan to 1 billion yuan.

If the floor plan and address are available, I can make a further evaluation. Use follow-up questions.