DC New 52: Animal Man #1 Sells Out; Goes To Second Print
Well then, it's no surprise the issue has sold out and is going to second print (according to Bleeding Cool).
Hitting up Ebay for a copy, prices seem to be around five bucks, plus a few for shipping. So it might cost you around ten for an Animal #1.
If you are more interested in reading than collecting, you can always purchase the digital version from any number of sources, including Comixology.
However, if you can't manage to get a copy, I imagine this is how you might feel: