Can we run through an example of how this works? Let's say I have a website that sells Super Bowl tickets. I open sales at market price of $1999.00. Then, does every time a purchase happen I send you a post event such as:

    {"item": 150242, "price": 1999.00, at: "2014-08-03T12:40:34Z"}

Then when rendering the product I call into your api to fetch the surge price adjusted value `/v1/150242` and get back:

    {"item" 150242, "quantity_left", 48, "surge_price": 2033.00, "original_price": 1999.00, "percent_change": 1.7 }