Here are the results* from a 200-click solo ad I bought from Chris Powell. You can find more reviews in my solo ad directory.
Clicks bought: 200
Clicks received: 173
Optins: 52
Optin percentage: 30%
Sales: 0
Cost Per Optin: $1.44
You can find Chris Powell at his website
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.