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Hi Jacobt,
Thanks for your comment and for reading my blog and sorry for taking so long to respond on your comment.
It does depend on your quality and style of your photos and which subject you have mainly focused on - I don't have any people in my images and if you have the right's and their permission to sell their photo's online ( you will need a signed releases form per site) - this will increase your sales.
People, pets, concepts and travel photo's are very popular and it always helps to have a photo or idea that no one has thought of.
Vectors, special effects and videos can have a larger sale price than photos.

I have been doing this for roughly 5 years and I can make around $150 - $240 per month, every site will increase and decrease in sales. (This week I made $15 for one image and the most I have ever made on one sale was around 150 Euro's for a use of one image).
You will need to pay tax on your income and it depends on which country you are based in and each site has a request payout around $30 - $100. Which country are you based in?

This a passive income and is not set in stone as it may take a few weeks or even months to even make a sale - the major reason is the online exposure and making new contacts.

Send me a link of your portoflio and I can try and give you more direction, if you like.
I have found that in the past that I thought one my images will really sell and it hardly sells and then another is a lot more popular and is sold weekly.

You can always sell your photos @ Picfair and Pond5 and you can request your own price per image, my link's of my photos - picfair.com/users/Vividrange
- pond5.com/artist/vividrange#1/35968

Hope I helped and good luck with your journey with photography and have a great week.
Catherine