You can allow respondents on your form to enter their own price value like so:
- Navigate to your Price field in the form editor and click on it.
- Locate the option labelled "Question is read only" in the configuration panel to the right.
- Ensure this is toggled to the Off position. If it is toggled to the On position, the field will be displayed but the amount cannot be changed.
Toggle price question's read-only status