Find here a list of free and affordable image websites. Some offer completely free public images. Others ask you to sign up and buy a credit packet or else you can pay and download per image.
FREE images websites
FREE textures websites
http://www.texturezoom.com/
Be careful when downloading free images from depositphotos.com. After that, your credit can be set to 0.
Also at dreamstime.com, shutterstock.com, 123.rf they are thieves and your credit can suddenly disappear.
PREMIUM images websites
Imago-images.com: News images
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