On the heels of two million dollar sales in February, the highest graded copy of Action Comics #1, CGC 8.5, sold on comicconnect.com for $1.5 million. You can read more about this comic here.
The $1.5 Million Comic:
If you want to get an idea of how Action #1 has performed as an investment, take a look the data below for sales from 2004 to 2009 (3 Sales of a CGC 2.5 Certified copy). It will be interesting to see how this high grade sale will affect lower grade prices.