Amazon is simply the best store that ever existed, by far, with incredible selection and unearthly convenience.  The price: cheap.

Facebook, Twitter, and other social media let us socialize with our friends, comfortably meet new people, and explore even the most obscure interests.  The price: free.

Uber and Lyft provide high-quality, convenient transportation.  The price: really cheap.

Skype is a sci-fi quality video phone.  The price: free.

Youtube gives us endless entertainment.  The price: free.

Google gives us the totality of human knowledge!  The price: free.

– Bryan Caplan, Ph.D., Voters as Mad Scientists: Essays on Political Rationality