Imagine the following conversation:

-Hey man, that's a really nice bike! -Thanks! -How much did you pay for it? -About {insert amount here}. -Wow! That's a lot of money! -Yeah, but considering that I save about 30 minutes of time on the road each day, I really think it was worth it.

So, let's see just how much time and money you could save by replacing your current means of transportation with a bike.

To the science mobile!

The idea:

If you earn n$ / hour, it's probably safe to say that your free time is also worth at least n$ / hour. Add this to the fact that riding a bike is absolutely free, and you're already getting places :)