I want to advertise with pay per click advertising. My budget is $50 a month for right now. What would be a good price to pay per click to have a decent position on a search engine?

i wouldn’t pay for it since it would take a lot lot more to get high rankings. you would be better of with free link exchanges, the more you advertise on the faster your clicks.
http://www.trafficswarm.com/go.cgi?621443
http://trafficg.com/?member=wilek
http://www.adlandpro.com/default.aspx?rep=wilek
http://hitgusher.com/?r=61459
http://hit2hit.com/?rid=13116
http://freetrafficbar.com/?r=71904

Kris