There are many advantages to buying a used excavator, here are ten reasons to consider:

1. High cost performance: Compared with brand-new excavators, second-hand excavators are usually cheaper. When you're on a tight budget, buying a used excavator can save you a lot of money while still meeting your project needs.

2. Save resources: Using second-hand excavators can reduce the need for new excavators, thereby reducing the exploitation of limited natural resources. This is a more environmentally friendly way to use resources.

3. After use and running-in: Second-hand excavators have been used and run-in for a period of time, so they are easier to adapt to various working conditions. For some small engineering tasks, a second-hand excavator can often complete the task better.

4. Parts are cheaper to replace: Since the second-hand excavator has been used for a period of time, some of its parts may have been replaced, so if parts need to be replaced, the cost will usually be lower.

5. Selectable brands and models: There are various brands and models to choose from in the second-hand excavator market. Users can choose the excavator that best suits them according to their needs and preferences.

6. Investment potential: In some cases, purchasing a used excavator may be an investment. Some valuable excavators may appreciate in value in the market and have certain investment potential in the long run.

7. Lower maintenance costs: Because a second-hand excavator has been used for a period of time, its maintenance cost is usually lower than that of a brand-new excavator.

8. Save training time: For some beginners or novices, second-hand excavators can save a lot of training time, allowing them to get started faster.

9. Flexibility: The second-hand excavator market is usually more flexible, and users can sell or replace the excavator at any time according to their needs.

10. Meet specific needs: For some specific engineering needs, such as excavation of old buildings or specific terrain, second-hand excavators may be more suitable.

To sum up, buying a second-hand excavator can provide you with an efficient, economical and environmentally friendly solution, which is ideal for users who still need efficient equipment despite a limited budget.