A few questions about Yahoo PPC
 

I have just recently signed up with Yahoo's PPC program and am wondering what kind of cost some of you are paying per click? I am noticing around $0.52 per click which I feel is incredibly high. I have tried choosing targeted keywords which have low search volume (134-2,000 something) for example: wordpress web host, and don't show getting very many monthly clicks from them but I figured they would be cheaper click wise.. Am I wrong here?

Any advice? What should I be doing to get cheaper clicks and more clicks? any ideas? please help!! :)