What is the average eCPM for AdMob Interstitial Ads??

Hi, what is the average eCPM for AdMob Interstitial Ads?? Especially for games.

Thanks!!

I can hardly see any sense in such question, eCPM you are going to achieve is based on many important factors, mostly main sources of your traffic.

Sometimes you might be offered flat eCPM if your app is really popular, but it has its pluses and minuses.

$2-3? or lower?