That's hard to tell, because you don't know the interest rates that you would have paid, if those baddies weren't there. However, you can estimate what the going interest rates on those loans would have been and take those rates, balances and terms and run them through an amortization schedule. You can do the same thing with the actual loans. Then, add up the interest on the actual loans and subtract the estimated interest on the fictitious loans and that is the estimated amount of $ that you have overpaid by having the baddies on your report.