When considering purchasing a CNC (Computer Numerical Control) Grinding Machine, some factors to consider include:

1. The types of materials that will be ground and the required tolerances.
2. The size and weight of the parts to be ground and the machine’s working envelope and capacity.
3. The number of axes that are required for the grinding process, and the machine’s available configurations.
4. The type of grinding process and wheel that is needed such as Surface, Cylindrical, Centerless grinding, etc.
5. The precision and repeatability required for the ground parts.
6. The availability and cost of tooling and grinding wheels.
7. The ease of programming and operation of the machine, including the available software and the ease of setup.
8. The reputation and service network of the manufacturer, and the availability of technical support and after-sales service.
9. The current automation, features and the power of the machine you are looking for.
10. The overall cost and return on investment.

It is important to have clear and specific needs before making a purchasing decision, and it would be helpful to consult with a grinding professional or an application engineer from the manufacturer to evaluate the machine and its suitability for your application before making a final decision.