Here are the results* from a 100-click solo ad I bought from Jonas Alferez . You can find more reviews in my solo ad directory.
Clicks bought: 100
Clicks received: 109
Optin percentage: 38%
% Tier 1: 57%
Cost Per Optin: $.68
You can buy a solo ad from Jonas Alferez at his website
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.