Once you input your search criteria, GetProspect allows you to preview the first 100 leads. It helps to see the example of the data which you will get once you save the search results. The rest of the results will be similar to the first hundred displayed.
To save more, click the Save all leads button, and in the dialog window input the maximum number of leads you want to get from the search.
Learn more on how to save leads from the search.