If you can’t find any free photos you like or you think the photos on this website aren’t suitable for your project, then you can check the great websites or microstock websites where you can purchase photos for between $1 and $15. You can find some pretty amazing photos on these websites, but you should know that the quality of the photos varies a lot, so be careful and choose photos with high-quality and high-resolution only.
The way that most of these websites work is quite simple. Professional and amateur photographers and illustrations submit their creations to the site. The editors from the website review the photos and the ones they think that are good enough are published on the website. When a certain photo is sold, the photographer (the owner of the photo) receives a commission (the commission is usually up to 60% of the total sale price).