Here are the results* from a 100-click solo ad I bought from John Atkins. You can find more reviews in my solo ad directory.
Clicks bought: 200-300
Clicks received: 283
Optin percentage: 58%
% Tier 1: 57%
Cost Per Optin: $.20
You can buy a solo ad from John Atkins by contacting him here
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.