Looks like handguns are more effective forms of self defense, poking around the web. Some pretty sobering information here:
Just a quick little review of a fun pistol I picked up not long ago.
I bought a brand new Smith and Wesson 22A off of gunbroker for $210 (plus 30 shipping to my FFL).
My version has the 5.5inch bull barrel and the solid wood target grips but there are many options out there including barrel...