(NPR) Coffee is important to many of us, but let’s say your coffee maker breaks. Finding a new one is as easy as typing “shop coffee maker” into your browser. Voila — you’ve got models, prices and customer reviews at your fingertips.

But say you need something less fun than a coffee maker — like a colonoscopy. Shopping for one of those is a lot harder. Actual prices for the procedure are almost impossible to find, and Bob Kershner says there’s huge variation in cost from one clinic to the next.

“You see the range is from $2,800 down to just about $400,” he says, pointing to a computer screen displaying some colonoscopy prices in Denver.

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