It’s relatively cheap in Seattle, and L.A. and San Francisco are pretty competitive, but it’s an entirely different story on the East Coast, especially in the nation’s capital.
The Internet makes it easy to compare prices for a lot of things -- you can shop around for the best deal on shoes, or research what salary you should be asking for in a job interview. Now, it's also helping people make sure they're not getting ripped off on the black market.