Pixel Tracking Accuracy

I am looking for an accurate pixel tracking system for a offer that I am set to go live with. I am the owner of the offer so its important that I find the most accurate system in order to eliminate paying for bunk leads/duplicate leads.

Ive looked into Google Analytics but nothing is very promising. Aside from that I need a solution that is able to integrate with PayPal and/or Plimus, Click2Sell, PayDotCom, e-junkie.

LinkTrust, and HasOffers.com are recommended pixel tracking systems but I am interested in finding a free, or less costly solution. Does anyone have ideas?

You could broker your offer with a network running on one of those systems. They'll handle the tracking for you.