Here are the results* from a 100-click solo ad I bought from Tom Geo. You can find more reviews in my solo ad directory.
Clicks bought: 200
Clicks received: 213
Optin percentage: 29%
% Tier 1: 57%
Cost Per Optin: $.95
You can buy a solo ad from Tom Geo at his website.
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.