You can do better than that.
So forgo Starbucks for just 2 days and take that ten bucks and buy credits at Stock Exchange or iStock Photo. You can get some nice pictures for your next presentation for $1-$2. And with a little clever searching they will project your point crisply. Remember, strong visuals are remembered.
Next for your brochures or websites, go to Getty images. This is where the pros hang out. You'll pay from $300 - $1,000 for images, but they're so much better.
And if you find an image that's *almost* what you want, figure out the name of the photographer. Do a search and drop them an email. Chances are they have the image you need.
And finally, if you do have the budget, hire a photographer. Nothing beats the quality and content of a custom job.
Your company is unique, so should your face to the world. Spend some time and money here.