Here are the results* from a 100-click solo ad I bought from Cornelia Enescu. You can find more reviews in my solo ad directory.
Clicks bought: 100
Clicks received: 103
Optin percentage: 38%
% Tier 1: 68%
Cost Per Optin: $1.03
You can buy a solo ad from Cornelia Enescu at her website
*These are the results from my squeeze page and sales funnel. Your results may vary from mine.