It has been estimated that 500,000,000 new photos are uploaded to the Internet -
e v e r y.
d a y.
But, lots of people and businesses are buying photographs.
In fact, more photos are bought today than ever before.
But most of the photos that are bought are bought by people in the photos.
That is what retail photography is all about. People go to the local photographer to have the photographer make photos for them.
Retail photographers usually charge a fee to make the photos, and then sell the photos to the people that commissioned the shoot.
The photographer retains copyright ownership.
Businesses buy photos that have people in them for advertising and promotion. Photographers that make photos for that kind of use are usually commercial photographers.
The commercial photography business model is different from the retail photography business model.
The photographer charges a 'creative fee' for making the images, and because the photographer retains copyright ownership, then sells the business a use license which is essentially a rental agreement. The business rents use of the photographers photos for their advertising and promotion. People in a photo have the right to approve or disapprove of the use of their likeness in advertising and promotional material. They give that permission by signing a document known as a Model Release.
https://contribute.gettyimages.com/producer/documents/Model_Release_English_Dec_2008.pdf
The 3rd type of photography is known as Editorial photography. On the past newspapers and magazines had staff photographers that made photos on assignment and were paid a salary. The company that paid the photographers salary owned the copyright to any photos the staff photographers made.
Mist staff editorial jobs have disappeared because newspapers, magazines, and other editorial image users now rely on stock, freelance, and amateur photographer made images.
Photos of flowers, your dog, the view up the street, your buddy doing a skateboard trick, the landscape at the lake or up in the mountains, etc. don't sell very often if at all.
So the content and quality of your photos would determine if you can sell them, or not.