It’s really easy – all too easy – to lift images from the web. If you’re creating web content, don’t do it. If you work for a business or non-profit you could get yourself and your organization in trouble. That’s as good a reason as any to refrain from doing the easy thing.
If you’re working on a client site you also don’t want to use stolen property.
Creators of content – copy, images, video, audio or other media – do not take it kindly if you rip them off. That’s how I feel too.
There are a lot of sites where you can license images at low cost. With these services, generally, once you open an account, you purchase credits that are used to license media. The more credits you buy the more you’ll save. The cost of a license depends on how the image will be used, how good or popular the image is and how large (canvas size) it is. Always make sure you have the right to use the image according to the license agreement.
I’ve used istockphoto for years but here’s a list of sources well known and trusted.
Careful with that last one. I think they’re pricey and a pain to deal with.