Collect data from certain sites in JSON format

There are 9 sites with different structure and different presentation of products on the site. We need to collect data from these sites, make sure that they do not repeat themselves and bring them to a common format. This will result in one large file in JSON format. For each product, in addition to the title, description and ID, there will be 17 parameters. On two sites, the parameters are loaded only after pressing the mouse keys on them. We need to automate this whole project. How much could it cost tentatively? Price in dollars!