Here are the results* from a 100-click solo ad I bought from Eyal Mizrachi . You can find more reviews in my solo ad directory.
Clicks bought: 100
Clicks received: 121
Optins: 68
Optin percentage: 56%
% Tier 1: 56%
Sales: 3
Cost Per Optin: $.13
You can buy a solo ad from Eyal Mizrachi at his website
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.