title: How to determine winning auction prices for ads served to me?
body: <p>With personal data mining in the news, monetization of this data and ultimately the valuation that Facebook, Google and others enjoy, derives from showing ads. </p>
  
  <p>I have what should be a pretty simple question-</p>
  
  <p>How much are advertisers actually paying to show me an ad? What's the winning price in each auction run for me?</p>
  
  <p>Prior art, there was a project called YourValue:</p>
  
  <p><a href="https://team.inria.fr/privatics/yourvalue/" rel="noreferrer">https://team.inria.fr/privatics/yourvalue/</a></p>
  
  <p><a href="http://privatics.inrialpes.fr/~lukasz/rtbdesc.html" rel="noreferrer">http://privatics.inrialpes.fr/~lukasz/rtbdesc.html</a></p>
  
  <p><a href="http://privatics.inrialpes.fr/~lukasz/rtbdesc2.html" rel="noreferrer">http://privatics.inrialpes.fr/~lukasz/rtbdesc2.html</a></p>
  
  <p>It was able to extract pricing on some sites, and had a Firefox and Chrome plugin:</p>
  
  <p><a href="https://addons.mozilla.org/en-US/firefox/addon/rtbwatcher/" rel="noreferrer">https://addons.mozilla.org/en-US/firefox/addon/rtbwatcher/</a></p>
  
  <p>Unfortunately it had very little adoption, and the project as a whole has now been dead for several years. It's unclear if the price detection machinery is still valid.</p>
  
  <p>In the realm of current work, header bidding and prebid.js can shed light on pricing:</p>
  
  <p><a href="http://prebid.org/dev-docs/toubleshooting-tips.html#see-all-bids-in-the-console" rel="noreferrer">http://prebid.org/dev-docs/toubleshooting-tips.html#see-all-bids-in-the-console</a></p>
  
  <p>But very few sites are using prebid.</p>
  
  <p>What's a programmatic way I figure out what my eyeballs are worth to advertisers across different sites?</p>