Getting Discounts from Seconds Need Help

Hello everyone. I am from Los Angeles and am witnessing some down turn in home values in certain areas. I am running into lots of properties where there are second liens, but i have been hardpressed in trying to get a discount for these liens. Most of the frustration comes from major banks. It’s a lot easier with private lenders and throw away seconds, but I get the run around with major banks and I can never get in contact with a manager with the authority to sell the lien. ANy suggestions or help would be appreciated. Thanks.